Publications

(in English)

1. 2016. A.J. Arumugham, M.M. Ulkhaq, M. Kocisko, R.K. Goyal, W.A. Yusmawiza and X. Qiu (Eds.), MATEC Web of Conferences Volume 68 (2016): 2016 The 3rd International Conference on Industrial Engineering and Applications (ICIEA 2016).

(in Bahasa Indonesia)

2. 2025. F. Azzahra, M.M. Ulkhaq & C.A.P. Hapsari (Eds.), Bunga Rampai Teknik Industri: Memperingati Hari Literasi Internasional. UNDIP Press (ISBN: 978-623-417-475-5).

3. 2023. M.M. Ulkhaq, C.A.P. Hapsari, and F. Azzahra (Eds.), Several Perspectives in Industrial Engineering Volume II: Celebrating 25 Years of Industrial Engineering Department of Diponegoro University. UNDIP Press (ISBN: 978-623-417-181-5).

4. 2022. M.M. Ulkhaq, C.A.P. Hapsari, and F. Azzahra (Eds.), Several Perspectives in Industrial Engineering. Volume I: A Tribute to Dr. Bambang Purwanggono Sukarsono. UNDIP Press (ISBN: 978-979-097-923-9).

5. 2015. M.M. Ulkhaq (Ed.), Proceeding 2nd Annual Conference on Industrial & System Engineering 2015. Departemen Teknik Industri Fakultas Teknik Universitas Diponegoro (ISBN: 978-979-97571-6-6).

(in English)

1. Putri, R.R., Ulkhaq, M.M., and Handayani, N.U., "Understanding consumer preferences in mall selection for urban tourism: A case study in Semarang, Indonesia," in Tourism Technology, Sustainability, and Local Community Empowerment [accepted].

2. 2024. Ulkhaq, M.M., "A slack-based measure of efficiency to assess logistics performance," in C.R. Zahra, R.I. Liperda, and H.M. Aqil (Eds.), Sustainable Supply Chain towards Circular Economy in SMEs (pp. 125-139). UNDIP Press.

3. 2023. Ulkhaq, M.M., “Logistics performance measurement: A data envelopment analysis using the logistics performance index 2018 data,” in M. Chand, V. Jain, and P. Ajmera (Eds.), Data Driven Technologies and Artificial Intelligence in Supply Chain: Tools and Techniques (pp. 58-76). CRC Press.

4. 2023. Wibowo, A.T., Putri, A.C.U., Tribosnia, M.R., Putawara, R., and Ulkhaq, M.M., “A machine learning application to predict customer churn: A case in Indonesian telecommunication company,” in B.B. Malik, K. Verma, R. Kar, A.K. Shaw, and S.M.N. Islam (Eds.), Advanced Mathematical Applications in Data Science (pp. 144-161). Bentham Science Publishers.

5. 2023. Ulkhaq, M.M., "Does ICT influence science performance of students in South-East Asian Countries? An analysis through OECD PISA 2018 Data," in D. Kaur, R. Mahajan, L.K. Sharma, A.Bhalla, and Chitsimran (Eds.), Emerging Trends in Education, Management and Society (pp. 51-60). Asian Press Books.

6. 2022. Pratiwi, T.N., Prasdinasi, L.V., Pratama, F.T., and Ulkhaq, M.M., “Parasocial relationship as a moderating variable for influencer endorsement—purchase intention relationship,” in A. Kumar, S. Das, S. Roy, N. Majumdar, and T. Deka (Eds.), Contemporary Issues in Corporate Management (pp. 197-209). Bharti Publications.

(in Bahasa Indonesia)

7. 2025. Ulkhaq, M.M., "Pengaruh ICT terhadap kemampuan membaca siswa Indonesia: Analisis dari data PISA 2022," in F. Azzahra, M.M. Ulkhaq & C.A.P. Hapsari (Eds.), Bunga Rampai Teknik Industri: Memperingati Hari Literasi Internasional (pp. 1-11). UNDIP Press.

8. 2023. Ulkhaq, M.M., "Pengukuran efisiensi industri manufaktur besar dan sedang di Provinsi Jawa Tengah", in M.M. Ulkhaq, C.A.P. Hapsari, and F. Azzahra (Eds.), Several Perspectives in Industrial Engineering Volume II: Celebrating 25 Years of Industrial Engineering Department of Diponegoro University (pp. 106-119). UNDIP Press.

9. 2022. Ulkhaq, M.M., “Efisiensi vs. Efektivitas” [in Bahasa Indonesia], in M.M. Ulkhaq, C.A.P. Hapsari, and F. Azzahra (Eds.), Several Perspectives in Industrial Engineering. Volume I: A Tribute to Dr. Bambang Purwanggono Sukarsono (pp. 313-328). UNDIP Press.

1. Arifin, F.I, Ulkhaq, M.M., and Purwanggono, B., "A bibliometric analysis of waste workers' behaviours: methods, theories, and trends across global research," Multidisciplinary Reviews [accepted].

2. Salsabila, S.S., Handayani, N.U., and Ulkhaq, M.M., "Towards effective and efficient humanitarian supply chain management: A framework for integrating lean and agile principles," Multidisciplinary Reviews [accepted].

3. Ulkhaq, M.M., "Assessing technical efficiency in Indonesia’s manufacturing sector: A two-stage analysis of large- and medium-sized industries," Journal of International Commerce, Economics and Policy [in press].

4. 2025. Putra, A.I.A. and Ulkhaq, M.M., "Assessing campus sustainability practices: A systematic literature review," Visions for Sustainability, vol. 23, pp. 93-121.

5. 2025. Ulkhaq, M.M., Oggioni, G., and Riccardi, R., "How efficient are schools in South-East Asia? An analysis through OECD PISA 2018 data," Educational Research and Evaluation, vol. 30, no. 3-4, pp. 212-243.

6. 2024. Ulkhaq, M.M., "Investigating the Impact of ICT on mathematics performance among students in South-East Asian countries: Insights from PISA 2018 data," Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia, vol. 16, pp. 69-84.

7. 2024. Handayani, N.U., Ulkhaq, M.M., Sari, D.P., Mahachandra, M., and Salsabila, S.S., "Building food resilience against floods: A systematic literature review of absortive, adaptive, and transformational strategies," Journal of Ecohumanism, vol. 8, no. 3, pp. 2674–2686.

8. 2024. Ulkhaq, M.M., Oggioni, G., and Riccardi, R., "Two-stage super-efficiency model for measuring efficiency of education in South-East Asia," Decisions in Economics and Finance, vol. 47, no. 2, pp. 513-534.

9. 2024. Susanto, N., Ulkhaq, M.M., and Tindaon U.A., "The effect of mobile phone use, traffic environment, and the interaction on driving performance of adult drivers: Empirical findings from 2² factorial design simulation," International Journal of Transport Development and Integration, vol. 8, no. 3, pp. 435-445.

10. 2024. Ulkhaq, M.M. and George Joseph, R.S., "Students’ attitudes towards campus sustainability: A comparison among three universities in Sweden," Environment, Development and Sustainability, vol. 26, pp. 16289–16313.

11. 2024. Purwaningsih, R., Nurkertamanda, D., Ulkhaq, M.M., Azzahra, F., and Musyaffa, D.A., "Designing nature-inspired swimming gloves: A biomimicry design spiral approach," Cogent Engineering, vol. 11, no. 1, 2316468.

12. 2024. Handayani, N. U., Sari, D. P., Ulkhaq, M. M., and Fitriani, R. A. C., "The analytic network process for identifying the potential sub-sectors of creative industry: Empirical finding from Semarang, Indonesia," Revista de Gestão Social e Ambiental, vol. 18, no. 3, e05016. 

13. 2023. Ulkhaq, M.M., Pramono, S.N.W., and Adyatama, A., "Assessing the tendency of judging bias in student competition: A data mining approach," Journal of Applied Research in Higher Education, vol. 15, no. 4, pp. 1198-1211.

14. 2022. Susanty, A., Akshinta, P.Y., Ulkhaq, M.M., and Puspitasari N., “Analysis of the tendency of transition between segments of green consumer behavior with a Markov chain approach,” Journal of Modelling in Management, vol. 17, no. 4, pp. 1177-1212.

15. 2021. Susanto, N., Prastawa, H., Sembiring, N.V., and Ulkhaq, M.M., "Life cycle assessment of high pressure-cooked smoked milkfish production: A case study in Semarang, Indonesia," EnvironmentAsia, vol. 14, no. 3, pp. 124-135.

16. 2021. Ulkhaq, M.M. and Adyatama, A., "Clustering countries according to the World Happiness Report 2019," Engineering and Applied Science Research, vol. 48, no. 2, pp. 137-150.

17. 2020. Ulkhaq, M.M., “Clustering countries according to the World Happiness Report,” Statistica & Applicazioni, vol. XVIII, no. 2, pp. 197-220.

18. 2020. Ulkhaq, M.M., Pertiwi, A.W.I., Pritandari, L., and Aditya, M.T., "Assessing mobile location-based service (m-LBS) quality: A combination of m-LBS quality scale and importance-performance analysis," Industrial Engineering & Management Systems, vol. 19, no. 3, pp. 597-609.

19. 2019. Jihn, C.H. and Ulkhaq, M.M., “Parallel discretization of the Markov chain approximation for the autoregressive moving average chart,” Communications in Statistics–Simulation and Computation, vol. 48, no. 9, pp. 2660-2678.

20. 2018. Pramono, S.N.W., Ulkhaq, M.M., Rachmadina, D.P., Trianto, R., Rachmadani, A.P., Wijayanti, W.R., and Dewi, W.R., “The use of quality management techniques: The application of the new seven tools,” International Journal of Applied Science and Engineering, vol. 15, no. 2, pp. 105-112.

21. 2018. Susanty, A., Ulkhaq, M.M., and Amalia, D., “Using multivariate control chart to maintain the quality of drinking water in accordance with standard,” International Journal of Applied Science and Engineering, vol. 15, no. 2, pp. 83-94.

22. 2018. Sari, D.P., Ulkhaq, M.M., Rinawati, D.I., and Rasyida, D.R., “Barriers of reverse logistics implementation: a case study in a car battery industry in Indonesia,” International Journal of Supply Chain Management, vol. 7, no. 5, pp. 53-67.

23. 2016. Ulkhaq, M.M., Nartadhi, R.L., and Akshinta, P.Y., “Evaluating service quality of Korean restaurants: A fuzzy analytic hierarchy approach,” Industrial Engineering & Management Systems, vol. 15, no. 1, pp. 77-91.

(in English)

1. 2025. Dewi, L.A.K. and Ulkhaq, M.M., "Work posture analysis and potential ergonomic hazards evaluation: A case at PT Pertamina Patra Niaga RJBT 4 Semarang," Journal of Psychology and Social Sciences [accepted].

2. 2025. Simamora, S.J.H., Ulkhaq, M.M., and Handayani, N.U., "Consumer decision-making in car purchases: Insights from a logistic regression analysis," LogicLink: Journal of Artificial Intelligence and Multimedia in Informatics, vol. 2, no. 1, pp. 70-77.

3. 2025. Wahmil, D.S., Pramono, S.N.W.P., and Ulkhaq, M.M., "Optimizing business strategy through SWOT and QSPM: A case study of CV Cita Nasional’s strategic challenges," Journal of Economic Analysis, vol. 4, no. 3, 65-89.

4. 2025. Qotrunnada, L., Handayani, N.U.H., and Ulkhaq, M.M., "Consumer preference analysis in choosing coffee shops in Semarang using conjoint analysis", Performa: Media Ilmiah Teknik Industri, vol. 24, no. 1, 51-58.

5. 2024. Handayani, N.U., Wibowo, M.A., Christiani, S.D.K., and Ulkhaq, M.M., "Implementation of outcome-based education from the perception of lecturers and students," Journal of Education Technology, vol. 8, no. 3, 472-483. 

6. 2024. Ulkhaq, M.M. and Pratiwi, T.N., "Purchasing strategies with Kraljic portfolio matrix: A case study in an investment management company," Jurnal Sistem dan Manajemen Industri, vol. 8, no. 2, pp. 119-128.

7. 2024. Aisyah, M.R. and Ulkhaq, M.M., "Inventory control analysis of materials for network installation: A case study at PT Pratama Persada Teknologi," Management Science and Information Technology, vol. 1, no. 1, pp. 57-65.

8. 2024. Ardiyawan, R. and Ulkhaq, M.M., "System dynamics modelling for municipal solid waste management - A literature review," International Journal of Academic Multidisciplinary Research, vol. 8, no. 4, pp. 207-216.

9. 2023. Azzahra, F., Purwaningsih, R., Ulkhaq, M.M., Khairunnisa, A.R., Dzaky, J. M., and Kamalia, S., "The social life cycle assessment in traditional brick production to formulate recommendation and improve environmental working condition," Jurnal Ilmu Lingkungan, vol. 21, no. 2, pp. 341-349.

10. 2023. Ulkhaq, M.M., "The determinants of Indonesian students' mathematics performance: An analysis through PISA data 2015 wave," Media Bina Ilmiah, vol. 17, no. 8, pp 1929-1934.

11. 2023. Ulkhaq, M.M., "Technical efficiency of Indonesian sharia banks: A data envelopment analysis approach," Al-Muhasib: Journal of Islamic Accounting and Finance, vol. 3, no. 1, 86-99.

12. 2023. Ulkhaq, M.M., "A slacks-based measure of efficiency in data envelopment analysis to assess efficiency of Indonesian sharia banks," Khatulistiwa, vol. 13, no. 1, pp. 37-46.

13. 2023. Ulkhaq, M.M., "Clustering countries according to the logistics performance index," Jurnal Teknik Informatika dan Sistem Informasi, vol. 10, no. 1, pp. 1010-1018.

14. 2022. Ulkhaq, M.M., "Measuring the efficiency of sharia business units of Indonesian private banks: a data envelopment analysis approach," Journal of Islamic Economics, Management, and Business, vol. 4, no. 2, pp. 207-214.

15. 2022. Ulkhaq, M.M., "Assessing technical efficiency of large and medium manufacturing industry in West Java Province, Indonesia: A data envelopment analysis approach," The ES Management and Business, vol. 1, no. 1, pp. 24-30.

16. 2022. Ulkhaq, M.M. and Pratiwi, T.N., "A data envelopment analysis approach to assess technical efficiency of large and medium manufacturing industry in Central Java Province, Indonesia," International Economic and Finance Review, vol. 1, no. 2, pp. 54–65.

17. 2021. Pramono, S.N.W., Ulkhaq, M.M., and Naufal, M., "An application of distribution requirements planning in inventory management: A case study," Asian Journal of Advances in Research, vol. 11, no. 4, pp. 283-290.

18. 2021. Dina, M.L., Rohmadoni, M., Firdausa, V.A., Rusdiyanto, A., Akshinta, P.Y., Ulkhaq, M.M., Suryanti, Ghofar, A., and Widyorini, N., "Investigating the relationship between sea surface temperature and chlorophyll-a concentration: An empirical finding from the North Coast of Semarang, Indonesia," Saintek Perikanan: Indonesian Journal of Fisheries Science and Technology, vol. 17, no. 3.

19. 2021. Ulkhaq, M.M., Pandiangan, S.H., Tarigan, E.L., Silalahi, A.R., and Lumbantobing, S.G., "Assessing customer satisfaction: A case in logistics service company," Jurnal Manajemen Indonesia, vol. 21, no. 2, pp. 141-151.

20. 2020. Ulkhaq, M.M., Adyatama, A., Fidiyanti, F., Rozaq, R., and Raharjo, M.F.M., “An artificial neural network approach for predicting customer loyalty: A case study in an online travel agency,” International Journal of Machine Learning and Computing, vol. 10, no. 2, pp. 283-289.

21. 2018. Ulkhaq, M.M., Prakoso, M.F.A., Sari, V.K., and Maduma, L., “Evaluating hospital service quality: An application of CZSQ and CZIPA,” International Journal of Innovation, Management and Technology, vol. 9, no. 6, pp. 246-251.

22. 2017. Ulkhaq, M.M., Rabbani, M., Wibowo, A.T., and Rachmania, B.A., “Assessing electronic service quality using E-S-QUAL and E-RecS-QUAL scales: A case of online fashion shop in Indonesia,” ITMSOC Transactions on Innovation & Business Engineering, vol. 2, no. 1, pp. 20-26.

23. 2016. Ulkhaq, M.M., Putra, B.E., Arianie, G.P., Amalia, A.N., and Pramono, S.N.W., “Applying CZSQ and CZIPA for assessing service quality of domestic low-cost carriers,” Journal of Economics, Business and Management, vol. 4, no. 9, pp. 538-545.

24. 2016. Ulkhaq, M.M., Prayogo, P.I., Firmansyah, M., and Agustina, D., “Assessing campus sustainability: A report from Diponegoro University, Indonesia,” International Journal of Information and Education Technology, vol. 6, no. 8, pp. 616–621.

25. 2016. Setyorini, N.A., Ulkhaq, M.M., Rasyida, D.R., Setiowati, P.R., and Trianto, R., “Assessing campus sustainability: An ISO 14001 approach,” International Journal of Advances in Agricultural and Environmental Engineering, vol. 3, no. 2, pp. 245-248.

26. 2016. Ulkhaq, M.M., Nurdianti, A.R., Kartika, M., and Astharina, V., “A confirmatory factor analysis of the source model for celebrity endorsement,” Journal of Management, Marketing and Logistics, vol. 3, no. 1, pp. 28-37.

(in Bahasa Indonesia)

27. 2025. Rahman, K.R. and Ulkhaq, M.M., "Analisis postur kerja pada pekerja outsourcing proses outbound pada Warehouse Food Material PT Ajinomoto Indonesia Mojokerto Factory menggunakan metode rapid entire body assessment dan quick exposures check," Industrial Engineering Online Journal, vol. 14, no. 3.

28. 2025. Pangestu, S.D. and Ulkhaq, M.M., "Analisis kebutuhan jumlah tenaga kerja optimal menggunakan metode work load analysis pada area general repair di Tunas Toyota Cilegon," Industrial Engineering Online Journal, vol. 14, no. 3.

29. 2025. Gultom, K.A. and Ulkhaq, M.M., "Analisis pemilihan vendor pelaksana kerja menggunakan metode analytical hierarchy process di PT X," Industrial Engineering Online Journal, vol. 14, no. 3.

30. 2025. Habibi, N.F. and Ulkhaq, M.M., "Strategi pengendalian persediaan dengan pendekatan klasifikasi ABC-FSN dan metode min-max pada material spiral wound gaskets di PT XYZ," Industrial Engineering Online Journal, vol. 14, no. 2.

31. 2025. Arkan, M.I. and Ulkhaq, M.M., "Penambahan footstep truk refueller guna menghindari awak mobil tangki (AMT) dari fatigue dan kecelakaan kerja," Industrial Engineering Online Journal, vol. 14, no. 1.

32. 2025. Muhammad, A.F. and Ulkhaq, M.M., "Forecasting strategic part dengan metode time series pada PT PLTU Tanjung Jati B Unit 3&4 Jepara,"  Industrial Engineering Online Journal, vol. 14, no. 1.

33. 2024. Wahmil, D.S., Pramono, S.N.W. and Ulkhaq, M.M., "Perancangan strategi bisnis untuk peningkatan kinerja penjualan perusahaan susu pasteurisasi menggunakan metode internal-external analysis dan QSPM," Industrial Engineering Online Journal, vol. 13, no. 4.

34. 2024. Rochmatullah, P.D., Pramono, S.N.W. and Ulkhaq, M.M., "Perancangan langkah pengendalian kualitas produksi dalam upaya mengurangi jumlah defect dengan menggunakan metode FMEA dan new seven tools pada produk bottom PT Inti Sukses Garmindo," Industrial Engineering Online Journal, vol. 13, no. 4.

35. 2024. Hera, S. H., Purwanggono, B., and Ulkhaq, M.M., "Perancangan manajemen resiko pada proyek pembangunan laboratorium terintegrasi Fakultas Teknik UNDIP," Industrial Engineering Online Journal, vol. 13, no. 3.

36. 2023. Sintawati, H., Umam, M.M., Ulkhaq, M.M., "Metode analisis SWOT berbasis ecotourism dan multi-attribute utility theory untuk pengembangan Kawasan Desa Wisata Lerep, Kabupaten Semarang," J@ti Undip: Jurnal Teknik Industri, vol. 18, no. 2, pp. 88-93.

37. 2023. Ulkhaq, M.M., "Determinan pencapaian siswa bidang matematika: Perbandingan antara Indonesia dan Singapura," Jurnal Inovasi Pembelajaran Matematika: PowerMathEdu, vol. 2, no. 1, pp. 9-16.

38. 2023. Ulkhaq, M.M., "Analisis efisiensi industri manufaktur besar dan sedang di Provinsi Jawa Barat," Studi Akuntansi, Keuangan, dan Manajemen, vol. 2, no. 2, pp. 113-120.

39. 2021. Ulkhaq, M.M., "Metode stochastic frontier analysis untuk mengukur efisiensi di sektor pendidikan," Sainteknol: Jurnal Sains dan Teknologi, vol. 19, no. 2, pp. 65-73.

40. 2018. Matondang, T.P. and Ulkhaq, M.M., “Aplikasi seven tools untuk mengurangi cacat produk white body pada Mesin Roller,” Jurnal Sistem dan Manajemen Industri, vol. 2, no. 2, pp. 59-66.

41. 2018. Hurisandi, V. and Ulkhaq, M.M., “Analisis tingkat efektivitas mesin delphi di PT Djarum Kudus dengan metode overall equipment efectiveness dan cause-effect diagram,” Industrial Engineering Online Journal, vol. 7, no. 3.

42. 2018. Ginting, E.I. and Ulkhaq, M.M., “Analisis pengendalian kualitas produksi menggunakan metode six sigma (studi pada Plant 4 Refinery PT Wilmar Nabati Indonesia),” Industrial Engineering Online Journal, vol. 7, no. 1.

43. 2018. Kirana, F.A. and Ulkhaq, M.M., “Usulan perbaikan sistem persediaan untuk meminimasi biaya total persediaan menggunakan metode optional replenishment pada PT Santomic Mitra Bersama,” Industrial Engineering Online Journal, vol. 7, no. 1.

44. 2017. Ulkhaq, M.M., Pramono, S.N.W., and Halim, R., “Aplikasi seven tools untuk mengurangi cacat produk pada Mesin Communite di PT. Masscom Graphy, Semarang,” Jurnal PASTI, vol. 11, no. 3, pp. 220-230.

45. 2017. Ulkhaq, M.M.and Barus, M.P.Br., “Analisis kepuasan pelanggan dengan menggunakan SERVQUAL: Studi kasus layanan IndiHome PT. Telekomunikasi Indonesia, Tbk, Regional 1 Sumatera,” Jurnal Sistem dan Manajemen Industri, vol. 1, no. 2, pp. 61-67.

46. 2017. Pramono, S.N.W., Pujotomo, D., Ulkhaq, M.M., and Permadi, D.T., “Redesain kemasan makanan ringan olahan pada UMKM Center Jawa Tengah dengan metode Kansei Engineering,” Performa, vol. 16, no. 1, pp. 77-86.

47. 2017. Putri, D.M. and Ulkhaq, M.M., “Penilaian risiko keselamatan kerja pada proses pembuatan balok jembatan dengan metode job safety analysis (JSA),” Industrial Engineering Online Journal, vol. 6, no. 4.

48. 2017. Putri, J.I. and Ulkhaq, M.M., “Identifikasi bahaya dan risikopada area produksi CV Mebel Internasional, Semarang dengan metode job safety analysis,” Industrial Engineering Online Journal, vol. 6, no. 1.

49. 2017. Yedida, C.Z. and Ulkhaq, M.M., “Perencanaan kebutuhan persediaan material bahan baku pada CV Endhigra Prima dengan metode min-max,” Industrial Engineering Online Journal, vol. 6, no. 1.

50. 2016. Rasyida, D.R. and Ulkhaq, M.M., “Aplikasi metode seven tools dan analisis 5w+1h untuk mengurangi produk cacat pada PT. Berlina, Tbk.,” Industrial Engineering Online Journal, vol. 5, no. 4.

51. 2016. Tania, F. and Ulkhaq, M.M., “Pengukuran dan analisis produktivitas di PT. Tiga Manunggal Synthetic Industries dengan menggunakan metode objective matrix (OMAX),” Industrial Engineering Online Journal, vol. 5, no. 4. 

1. 2025. Ulkhaq, M.M., Handayani, N.U., and Apriliyanto, C., "The influence of technical, social, and personal factors on generation Z’s purchase intentions toward local products in social commerce," 4th Brawijaya Economics and Finance International Conference [Online], September 18-19.

2. 2025. Ulkhaq, M.M., Widadi, I., and Faradis, I. "Digitalization of transaction recording in physical commodity trading," 4th Brawijaya Economics and Finance International Conference [Online], September 18-19.

3. 2025. Handayani, N.U., Ulkhaq, M.M., and Prakosa, N.G.A., "Modeling plastic recycling behavior: Analyzing inhibiting factors using the theory of planned behavior," 10th International Conference on Energy, Environment, and Information Systems, Semarang, Indonesia, August 26-27.

4. 2025. Rantiani, N.P. and Ulkhaq, M.M., "Reducing installation failure through RCA: A case of IndiHome in Semarang and Pekalongan districts," 2nd International Student Conference on Economics and Business Excellence [Online], June 21.

5. 2025. Dewi, L.A.K. and Ulkhaq, M.M., "Work posture analysis and potential ergonomic hazards evaluation: A case at PT Pertamina Patra Niaga RJBT 4 Semarang," 4th International Conference on Psychology and Behavioral Sciences [Online], June 14. 

6. 2025. Ulkhaq, M.M., "Global logistics efficiency: A benchmarking study using data envelopment analysis and the 2023 logistics performance index," Conference on Performance and Management [Online], May 22-23.

7. 2024. Ulkhaq, M.M. and Pratiwi, T.N., "Analysis of Indonesia’s position in the 2023 logistics performance index," 4th International Conference on Religion, Science and Education [Online], November 20.

8. 2024. Prayoga, R.A., Sriyanti, N.W., and Ulkhaq, M.M., "Assessing e-service quality and e-service quality's recovery of e-marketplace: A case in Indonesia," Jakarta International on Multidisciplinary Studies towards Creative Industries, Jakarta, Indonesia, November 12-23.

9. 2024. Pangestu, S.D. and Ulkhaq, M.M., "Analysis of optimal workforce requirements using the work load analysis method in the general repair area at Tunas Toyota Cilegon," International Conference on Education, Religion and Social Studies [Online], October 16.

10. 2024. Soepadmoyo, M.A. and Ulkhaq, M.M., "Analysis of inventory control in the biscuit warehouse using ABC classification and min-max methods of a ceramic company (case study: PT. ABC)," International Conference on Education, Religion and Social Studies [Online], October 16. 

11. 2024. Ulkhaq, M.M., Handayani, N.U., Dzaky. J. M., and Adyatama, A., "Designing logistics distribution routes for the Cianjur Earthquake using genetic algorithm," 1st International Seminar Advance in Science and Technology [Online], September 30.

12. 2024. Handayani, N.U., Ulkhaq, M.M., and Naufal. A. F., "Designing a framework for assessing graduate competencies in the bachelor’s program at the Faculty of Engineering, Diponegoro University," 1st International Seminar Advance in Science and Technology [Online], September 30.

13. 2024. Ulkhaq, M.M., "Factors influencing Indonesian students' performance on PISA 2018," 2nd International Conference of Innovation, Science, Technology, Education, Children, and Health [Online], August 24. 

14. 2024. Handayani, N.U., Ulkhaq, M.M., & Asri, M., "The moderating effect of environmental awareness on consumers' willingness to pay for the body shop brand products," 2nd International Conference on Anthropocene, Global Environmental Change and Powerful Geography [Online], August 10.

15. 2024. Ulkhaq, M.M., Handayani, N.U., & Putra, A.I.A., "Analysing student attitudes towards campus sustainability: A comparative study of "green" and "non-green" universities," 2nd International Conference on Anthropocene, Global Environmental Change and Powerful Geography [Online], August 10.

16. 2024. Ulkhaq, M.M., "The determinants of Indonesian students' reading performance: An analysis through PISA data 2015 wave," 8th International Conference on Islamic Studies [Online], July 30-31.

17. 2023. Ulkhaq, M.M., & Nuryawan, D.A., "Hazard identification, risk assessment, and risk control in an alcohol warehouse: A case study," International Conference on Informatics, Mechanical, Industrial and Chemical Engineering [Online], October 25.

18. 2023. Habiburrahman, R., & Ulkhaq, M.M., "Innovation readiness analysis of battery electric vehicle: A case of Gesits G1," 3rd International Conference on Religion, Science and Education [Online], November 15.

19. 2023. Limbong, V.A.Y., & Ulkhaq, M.M., "Identifying risk factors in an office work environment using the Rapid Office Strain Assessment: A case study," 3rd International Conference on Religion, Science and Education [Online], November 15.

20. 2023. Ulkhaq, M.M., "The determinants of Indonesian students' reading performance: An analysis through PISA data 2015 wave," 3rd International Conference on Education [Online], October 23.

21. 2022. Ulkhaq, M.M., "The determinants of Indonesian students’ science performance: An analysis through PISA data 2018," 2nd International Conference on Religion, Science and Education [Online], December 20.

22. 2022. Ulkhaq, M.M., "The determinants of Indonesian students' reading performance: An analysis through PISA data 2015 wave," 2nd International Conference on Education [Online], November 24.

23. 2022. Ulkhaq, M.M., "The determinants of Indonesian students’ science performance: An analysis through PISA data 2018," 9th International Conference on Technical and Vocational Education and Training [Online], November 19.

24. 2022. Ulkhaq, M.M., "The determinants of Indonesian students' mathematics performance: An analysis through PISA Data 2018 wave," Jakarta International on Multidisciplinary Studies towards Creative Industries [Online], November 16.

25. 2022. Ulkhaq, M.M. and Handayani, N.U., “Does ICT influence the mathematics performance of students in South-East Asian countries? An analysis through OECD PISA 2018 data,” 10th Regional Conference in Engineering Education [Online], November 8.

26. 2022. Handayani, N.U., Ulkhaq, M.M., Wibowo, M.A., & Christiani, S.D.K., “Assessing the implementation of outcome-based education from the perception of lecturers and students: A case in the Faculty of Engineering at Diponegoro University, Indonesia,” 10th Regional Conference in Engineering Education [Online], November 8.

27. 2022. Ulkhaq, M.M., "Does ICT influence the language performance of students in South-East Asian countries? An analysis through OECD PISA 2018 data," 3rd Dirundeng International Conference on Islamic Studies [Online], September 27-29. 

28. 2022. Ulkhaq, M.M., "Clustering countries according to the logistics performance index," 2nd International Conference on Advanced Information Technology and Communication" [Online], September 26.

29. 2022. Purwaningsih, R., Prastawa, H., Azzahra, F., Maypemi, N.P., and Ulkhaq, M.M., "A resource allocation model for higher education based on the combination of efficiency measurement and market position mapping," 3rd Asia Pacific Conference on Industrial Engineering and Operations Management [Online], September 13-15.

30. 2022. Ulkhaq, M.M., Oggioni, G., Riccardi, R., and De Witte, K., “Does ICT improve education outcomes and efficiency? A panel data analysis through OECD PISA data,” 8th International Workshop on Efficiency in Education, Health and Other Public Services, Pisa, Italy, September 8-9.

31. 2022. Ulkhaq, M.M., "The determinants of Indonesian students' mathematics performance: An analysis through PISA Data 2018 wave," 1st Annual Conference of Islamic Education [Online], August 16.

32. 2022. Ulkhaq, M.M., "Technical efficiency of Indonesian sharia banks: A data envelopment analysis approach," 1st Annual International Conference on Islamic Economics, Business, and Philanthropy [Online], August 10.

33. 2022. Ulkhaq, M.M., "The determinants of Indonesian students' mathematics performance: An analysis through PISA Data 2018 wave," International Seminar & Call for Paper "Education, Culture, and Nationalism in New Era" [Online], June 18.

34. 2022. Ulkhaq, M.M., Adi, D.E., Ulina, J., and Wijaya, E.V., "Garuda Indonesia experience: A new concept of airline service," International Conference on Sustainable Engineering and Technology [Online], June 7.

35. 2021. Dina, M.L., Rohmadoni, M., Firdausa, V.A., Rusdiyanto, A., Akshinta, P.Y., and Ulkhaq, M.M., Suryanti, Ghofar, A., and Widyorini, N., "Investigating the relationship between sea surface temperature and chlorophyll-a concentration: An empirical finding from the North Coast of Semarang, Indonesia," 10th International Conference of Aquaculture Indonesia [Online], October 28-30.

36. 2021. Ulkhaq, M.M, Wibowo, A.T., Tribosnia, M.R., Putawara, R., and Firdauz, A.B., "Predicting customer churn: A comparison of eight machine learning techniques: A case study in an Indonesian telecommunication company," International Conference on Data Analytics for Business and Industry [Online], October 25-26.

37. 2021. Suliantoro, H., Dilaga, D.A., and Ulkhaq, M.M., "Formulating strategic purchasing strategy: A case study," 7th International Conference on Industrial, Mechanical, Electrical and Chemical Engineering [Online], October 5.

38. 2021. Ulkhaq, M.M., de Witte, K., Oggioni, G., and Riccardi, R., "ICT as a determinant of inefficiency: An efficiency measurement in education of selected 24 OECD countries," Association for Mathematics Applied to Social and Economic Sciences Conference XLV [Online], September 13-18.

39. 2021. Ulkhaq, M.M., de Witte, K., Oggioni, G., and Riccardi, R., "ICT as a determinant of inefficiency: An efficiency measurement in education of selected 24 OECD countries," 22nd Conference of the International Federation of Operational Research Societies [Online], August 23-27.

40. 2021. Ulkhaq, M.M., "Efficiency analysis of Indonesian schools: A stochastic frontier analysis using OECD Pisa 2018 data," 2nd Asia Pacific International Conference on Industrial Engineering and Operations Management [Online], September 14-16.

41. 2021. Ulkhaq, M.M., de Witte, K., Oggioni, G., and Riccardi, R., "ICT as a determinant of inefficiency: An efficiency measurement in education of selected 24 OECD countries," 31st European Conference on Operations Research [Online], July 11-14.

42. 2021. Ulkhaq, M.M., Wijayanti, W.R., Dilaga, D.A., Qadarullah, A.A., and Arfi, F., "Combining the analytic hierarchy process and importance-performance analysis to assess service quality of m-commerce: A case of Indonesian m-commerce," 8th International Conference on Industrial Engineering and Applications [Online], April 23-26.

43. 2021. Ulkhaq, M.M., Cahyo, A., Rustanti, A., Gobel, L., Dasminar, M., and Wijaya, E.V., “Service quality assessment of e-wallet,” 2nd South American International Conference on Industrial Engineering and Operations Management [Online], April 5-8.

44. 2021. Waly, G.Z., Miranda, I.E., Adelia, D.R., Oktavia, W.D., Aulia, M.A., Wibowo, A.T., and Ulkhaq, M.M., "Assessing customer satisfaction of airport train service: An application of the Kano model," 8th International Conference on Coastal and Ocean Engineering [Online], April 3-5.

45. 2021. Susanty, Ulkhaq, M.M., Puspitasari, N.B., Prastawa, H., Akshinta, P.Y., and Listyawardhani, P., "Socio-economic factors affecting environmental concern and knowledge of consumers’ purchasing behaviors of green products: A study of Semarang Regency," 11th Annual International Conference on Industrial Engineering and Operations Management, Singapore, Singapore, March 7-11.

46. 2020. Haddist, K., Leonita, W., Chairunnisa, Z.H., Prakoso, E.R., and Ulkhaq, M.M., "Service quality assessment of mobile internet provider: A case in Indonesia," 4th International Conference on Software and e-Business, Osaka, Japan, December 18-20.

47. 2020. Harahap, S.M., Cahyarini, W., Utami, D.N.I., Wijayanti, W.R., and Ulkhaq, M.M., “Measuring service quality using IPGA model: A case study in Indonesian train station,” International Conference on Civil, Architectural and Environmental Engineering, Christchurch, New Zealand, November 23-25.

48. 2020. Husnayani, F., Widyaztuti, B.A., Kadafi, C.A., Widodo, A.K., Apriesti, D., and Ulkhaq, M.M., “Zone of tolerance analysis: A case in Indonesian train station,” International Conference on Civil, Architectural and Environmental Engineering, Christchurch, New Zealand, November 23-25. 

49. 2020. Pramono, S.N.W., Ulkhaq, M.M., Aulia, Z., "Analysing the barriers of reverse logistics implementation: A case study," Joint International Conference of 2nd International Conference on Industrial and System Engineering and 7th Annual Conference on Industrial and System Engineering, Surabaya, Indonesia, July 22-23.

50. 2020. Astari, F., Astari F., Kahfi, R.S., Ardi, F., Oki, L., and Ulkhaq, M.M., "Service quality assessment of theme park," 2nd International Conference on Management Science and Industrial Engineering, Osaka, Japan, April 7-9.

51. 2019. Nasution, F.I.H., Khairunnisa, A.K., Menawan, A.A., Gobel, L., Ardi, F., and Ulkhaq, M.M., “Assessing website quality of online travel agency: An application of the importance-performance and gap analysis model,” 3rd International Conference on Digital Technology in Education, Yamanashi, Japan, September 21-23.

52. 2019. Handayani, N.U., Sari, D.P., Ulkhaq, M.M., Widharto, Y., and Fitriani, R.C.A, “A data envelopment analysis approach for assessing the efficiency of sub-sectors of creative industry: A case study of batik enterprises from Semarang, Indonesia,” 5th International Conference on Industrial, Mechanical, Electrical and Chemical Engineering, Surakarta, Indonesia, September 17-18.

53. 2019. Handayani, N.U., Sari, D.P., Ulkhaq, M.M., Nugroho, A.S., and Hanifah, A., “Identifying factors for assessing regional readiness level to manage natural disaster in emergency response periods,” 5th International Conference on Industrial, Mechanical, Electrical and Chemical Engineering, Surakarta, Indonesia, September 17-18.

54. 2019. Ulkhaq, M.M., Ardiani, A.J., Farhan, M., Bagja, R.P., and Hanif, R.M., “Service quality analysis of bus rapid transit: A case in Semarang, Indonesia,” 4th International Conference on Intelligent Transportation Engineering, Singapore, September 5-7.

55. 2019. Ulkhaq, M.M., Wijayanti, W.R., Putri, A.A.A., Maypemi, N.P., Cahyarini, W., Silviannisa, and Rohmah, L.R., “An application of the disconfirmation model for assessing service quality of retail stores,” International Conference on Engineering, Science, and Industrial Applications, Tokyo, Japan, August 22-24.

56. 2019. Handayani, N.U., Rinawati, D.I., Wibowo, M.A., Gabriela, T., and Ulkhaq, M.M., “The driver and barrier of implementation green supply chain management (GSCM) in construction projects,” Broad Exposure to Science and Technology, Denpasar, Indonesia, August 7-8.

57. 2019. Wibowo, M.A., Handayani, N.U., Sinaga, G, Sholeh, M.N., and Ulkhaq, M.M., “The performance of building construction supply chain: A case study in building construction project,” Broad Exposure to Science and Technology, Denpasar, Indonesia, August 7-8.

58. 2019. Ulkhaq, M.M., Fidiyanti, F., Adyatama, A., Maulani, Z.A., and Nugroho, A.S., “Segmentation of cinema audiences: An empirical finding from Indonesia,” 2nd International Conference on Data Storage and Data Engineering, Jeju, Rep. of Korea, June 15-18.

59. 2019. Ulkhaq, M.M., Prakoso, M.F.A., Sari, V.K., Maduma, L., and Hazazi, M.H., “Assessing the attitudes of students to sustainability: A comparison between two universities,” 5th International Conference on Education and Training Technologies, Seoul, Rep. of Korea, May 27-29.

60. 2019. Utami, A.A., Ginanjar, A.G., Fadlia, N., Lubis, I.A., and Ulkhaq, M.M., “Using shopping and time attitudes to cluster food shoppers: An empirical finding from Indonesia,” 3rd International Conference on Data Mining, Communications and Information Technology, Beijing, China, May 24-26.

61. 2019. Minako, F.S., Ulkhaq, M.M., Pratiwi, A.R.A., ‘Sa Nu, D., and Akshinta, P.Y., “Clustering internet shoppers: An empirical finding from Indonesia,” 5th International Conference on E-business and Mobile Commerce, Taichung, Taiwan, May 21-24.

62. 2019. Pramono, S.N.W., Ulkhaq, M.M., Pujotomo, D., and Ardhini, M.A., “Assessing the efficiency of small and medium industry: An application of data envelopment analysis” 6th Annual Conference on Industrial & System Engineering, Semarang, Indonesia, April 23-24.

63. 2019. Ulkhaq, M.M., Rabbani, M., Wibowo, A.T., Rachmania, B.A., and Ardi, F., “Integrating importance-performance analysis into E-S-QUAL and E-RecS-QUAL scales for assessing electronic service quality,” 6th Annual Conference on Industrial & System Engineering, Semarang, Indonesia, April 23-24.

64. 2019. Ulkhaq, M.M., George Joseph, R.S., Javed, B., and Nadekar, N.R., “Campus sustainability practice assessment: An empirical finding from Jönköping University, Sweden,” 6th Annual Conference on Industrial & System Engineering, Semarang, Indonesia, April 23-24.

65. 2019. Rozaq, R., Larasati, D.M., Tampubolon, D.H., Ramadhani, R., and Ulkhaq, M.M., “An application of the Kano model for assessing customer satisfaction of hospital service quality,” 6th International Conference on Industrial Engineering and Applications, Tokyo, Japan, April 12-15.

66. 2019. Ulkhaq, M.M., Adyatama, A., Fidiyanti, F., Rozaq, R., and Raharjo, M.F.M., “An artificial neural network approach for predicting customer loyalty: A case study in an online travel agency,” 4th International Conference on Computer and Communication Systems, Singapore, February 23-25.

67. 2018. Ulkhaq, M.M., Widodo, A.K., Widhiyaningrum, Yulianto, M.F.A., and Gracia, M.O., “An integrated M-S-QUAL and importance-performance analysis approach for assessing service quality of mobile commerce application,” 5th International Conference on Engineering, Technology, and Industrial Application, Surakarta, Indonesia, December 12-13. 

68. 2018. Ulkhaq, M.M., Prakoso, M.F.A., Sari, V.K., and Maduma, L., “Evaluating hospital service quality: An application of CZSQ and CZIPA,” 4th International Conference on Smart Material Research, Sydney, Australia, November 16-18.

69. 2018. Wijayanti, W.R., Dewi, W.R., Ardi, F., Fajri, A., Ulkhaq, M.M., and Akshinta, P.Y., “Combining the fuzzy AHP and TOPSIS to evaluate service quality of e-commerce website,” 10th International Conference on Education Technology and Computers, Tokyo, Japan, October 26-28.

70. 2018. Ulkhaq, M.M., Widodo, A.K., Izati, N., Santoso, S.Y., Sutrimo, W.H.W.M., and Akshinta, P.Y., “Assessing the operations of commuter rail: A case study in KRL commuter line of Jakarta Metropolitan Area,” 2nd International Conference on Functional Materials and Chemical Engineering, Abu Dhabi, United Arab Emirates, October 26-28. 

71. 2018. Ulkhaq, M.M., Rozaq, R., Ramadhani, R., Heldianti, R., Fajri, A., and Akshinta, P.Y., “Validity and reliability assessment of the game addiction scale: An empirical finding from Indonesia,” 4th International Conference on Industrial and Business Engineering, Macau, October 24-26.

72. 2018. Ulkhaq, M.M., Siamiaty, A.D., Handoko, A., Madjid, S.A., and ‘Sa Nu, D., “The fuzzy analytic hierarchy process for prioritizing the sustainable tourism attitude scale,” 2nd International Conference on Environmental, Industrial and Energy Engineering, Bangkok, Thailand, October 19-21.

73. 2018. Sari, D.P., Wijayanti, W.R., Prayogo, A., Ulkhaq, M.M., and Rinawati, D.I., “An integrated fuzzy AHP and TOPSIS model for evaluating the performance of raw material suppliers: A case study in Lasem Batik Writing Centre,” 2nd International Mechanical and Industrial Engineering Conference, Malang, Indonesia, August 30-31.

74. 2018. Sari, D.P., Handayani, N.U., Ulkhaq, M.M., Budiawan, W., Maharani, D.L., and Ardi, F., “A data envelopment analysis approach for assessing the efficiency of small and medium-sized wood-furniture enterprises: A case study,” 2nd International Mechanical and Industrial Engineering Conference, Malang, Indonesia, August 30-31.

75. 2018. Pramono, S.N.W., Ulkhaq, M.M., Raharjo, R., and Ardi, F., “A gap analysis on implementation of safety management system in airport: A case study,” 4th International Conference on Science and Technology, Yogyakarta, Indonesia, August 7-8. 

76. 2018. Susanty, A., Ulkhaq, M.M., and Amalia, D., “Using multivariate control chart to maintain the quality of drinking water in accordance with standard,” 5th Annual Conference on Industrial and System Engineering, Yogyakarta, Indonesia, July 3-5. 

77. 2018. Pramono, S.N.W., Ulkhaq, M.M., Rachmadina, D.P., Trianto, R., Rachmadani, A.P., Wijayanti, R., and Dewi, W.R., “The use of quality management techniques: The application of the new seven tools,” 5th Annual Conference on Industrial and System Engineering, Yogyakarta, Indonesia, July 3-5.

78. 2018. Ulkhaq, M.M., Fidiyanti, F., Raharjo, M.F.M., Siamiaty, A.D., Sulistiyani, R.E., Akshinta, P.Y., and Nugroho, E.A., “Evaluating hospital service quality: A combination of the AHP and TOPSIS,” 2nd International Conference on Medical and Health Informatics, Tsukuba, Japan, June 8-10.

79. 2018. Ulkhaq, M.M., Wijayanti, W.R., Dewi, W.R., Prayogo, A., Aulia, F.S., Utami, A.A., and Mustikasari, A., “Formulating a marketing strategy of SME through a combination of 9Ps of marketing mix and Porter’s five forces: A case study,” 1st International Conference on Big Data Technologies, Hangzhou, China, May 18-20.

80. 2018. Ulkhaq, M.M., Wijayanti, W.R., Zain, M.S., Baskara, E., and Leonita, W., “Combining the AHP and TOPSIS to evaluate car selection,” 2nd International Conference on High Performance Compilation, Computing and Communications, Hong Kong, March 15-17.

81. 2017. Ulkhaq, M.M. and Dewanta, F., “Original observations-based control charts for monitoring the mean of auto-correlated processes: A comparison among modified Shewhart, modified EWMA, and ARMAST charts,” 3rd International Materials, Industrial and Manufacturing Engineering Conference, Miri, Malaysia, December 6-8.

82. 2017. Pramono, S.N.W., Ulkhaq, M.M., Trianto, R., Rasyida, D.R., Setyorini, N.A., Setiowati, P.R., and Jauhari, W.A., “Integrating the analytic hierarchy process and importance-performance analysis into ISO 14001 framework for assessing campus sustainability,” 3rd International Materials, Industrial and Manufacturing Engineering Conference, Miri, Malaysia, December 6-8.

83. 2017. Ulkhaq, M.M., Widodo, A.K., Yulianto, M.F.A., Widhiyaningrum, Mustikasari A., and Akshinta, P.Y., “A logistic regression approach to model the willingness of consumers to adopt renewable energy sources: A case study in Semarang, Indonesia,” 1st International Conference on Renewable Energy and Environment, Toronto, Canada, November 1-3. 

84. 2017. Ulkhaq, M.M., Pertiwi, A.W.I., Pritandari, L., and Aditya, M.T., “Assessing mobile location-based service (m-LBS) quality: A combination of m-LBS quality scale and importance-performance analysis,” 4th International Conference on Sciences, Technology and Social Sciences, Singapore, October 28-29.

85. 2017. Caraka, R.E., Saputra, P.M.A., Wijaya, N., Ulkhaq, M.M., and Subair, M., “Statistical analysis of postal and trade network data within ASEAN countries and beyond,” 7th International Seminar on New Paradigm and Innovation on Natural Sciences and Its Application, Semarang, Indonesia, October 17.

86. 2017. Ulkhaq, M.M., Wijayanti, W.R., Wiganingrum, R., Dewi, W.R., and Ardi, F., “Assessing university’s sustainability programs from the perspective of university students: A gap analysis,” 2nd International Conference on Engineering and Technology for Sustainable Development, Yogyakarta, Indonesia, September 13-14. 

87. 2017. Ulkhaq, M.M., Wijayanti, W.R., Kusumawati, A., Aulia, F.S., Wijayanti, R.S., and Wiganingrum, R., “Combining the eTransQual scale and importance-performance analysis to assess service quality of online shopping,” 4th International Conference on Industrial Engineering and Applications, Nagoya, Japan, April 21-23.

88. 2016. Ulkhaq, M.M., Rabbani, M., Wibowo, A.T., and Rachmania, B.A., “Assessing electronic service quality using E-S-QUAL and E-RecS-QUAL scales: A case of online fashion shop in Indonesia,” 1st Technology Innovation Management and Engineering Science – International Conference, Bangkok, Thailand, November 28-30.

89. 2016. Ulkhaq, M.M., Putra, B.E., Arianie, G.P., Amalia, A.N., and Pramono, S.N.W., “Applying CZSQ and CZIPA for assessing service quality of domestic low-cost carriers,” 7th International Conference on Economics, Business and Management, Sydney, Australia, November 24-26.

90. 2016. Setyorini, N.A., Ulkhaq, M.M., Rasyida, D.R., Setiowati, P.R., and Trianto, R., “Assessing campus sustainability: An ISO 14001 approach,” 2nd International Conference on Advances in Chemical, Biological & Environmental Engineering, Singapore, May 11-12.

91. 2016. Ulkhaq, M.M., Akshinta, P.Y., Nartadhi, R.L., and Pramono, S.N.W., “Assessing sustainable rural community tourism using the AHP and TOPSIS approaches under fuzzy environment,” 3rd International Conference on Industrial Engineering and Applications, Hong Kong, April 28-30.

92. 2016. Rasyida, D.R., Ulkhaq, M.M., Setiowati, P.R., and Setyorini, N.A., “Assessing service quality: A combination of SERVPERF and importance-performance analysis,” 3rd International Conference on Industrial Engineering and Applications, Hong Kong, April 28-30.

93. 2015. Ulkhaq, M.M., Nartadhi, R.L., and Akshinta, P.Y., “A fuzzy analytic hierarchy process methodology for evaluating service quality: A case of Korean restaurants in Semarang, Indonesia,” 8th Conference of Indonesian Student Association in Korea, Daejeon, Rep. of Korea, September 5-6.

94. 2015. Setyorini, N.A., Ulkhaq, M.M., Rasyida, D.R., and Setiowati, P.R., “Campus sustainability assessment using ISO 14001: A case study at Diponegoro University, Indonesia,” 8th Conference of Indonesian Student Association in Korea, Daejeon, Rep. of Korea, September 5-6.

95. 2015. Nurdianti, A.R., Kartika, M., Astharina, V., and Ulkhaq, M.M., Confirmatory factor analysis of the celebrity endorsement: A case study on Joshua Suherman as a celebrity endorser for ‘Nutrisari Rasa Jeruk’,” 8th Conference of Indonesian Student Association in Korea, Daejeon, Rep. of Korea, September 5-6.

96. 2015. Ulkhaq, M.M., Prayogo, P.I., Firmansyah, M., and Agustina, D., “Assessing campus sustainability: A report from Diponegoro University, Indonesia,” 5th International Conference on Environment and Industrial Innovation, Seoul, Rep. of Korea, March 10-11.

97. 2014. Ulkhaq, M.M., “Customer perception of waiting time: an integrated review and research propositions,” 7th Conference of Indonesian Student Association in Korea, Daejeon, Rep. of Korea, August 23-24.

98. 2013. Jihn, C.H. and Ulkhaq, M.M., “Parallel discretization for computational efficiency of average run length of ARMA chart,” Korean Institute of Industrial Engineers Autumn Conference, Suwon, Rep. of Korea, November 15.

99. 2013. Jihn, C.H. and Ulkhaq, M.M., “Efficient average run length computation for ARMA chart,” 12th Korea-China Quality Symposium, Seoul, Rep. of Korea, August 12-14.

1. 2024. Ulkhaq, M.M., "Pengukuran efisiensi sektor logistik menggunakan data envelopment analysis," Seminar Nasional Teknologi, Energi dan Mineral, Surabaya [Online], 28 November.

2. 2024. Ulkhaq, M.M., "Analisis dampak teknologi informasi dan komunikasi (TIK) terhadap kinerja siswa Indonesia dalam ilmu sains: Bukti dari data PISA 2022," Seminar Nasional Sanata Dharma Berbagi, Yogyakarta [Online], 20 September.

3. 2022. Ulkhaq, M.M., "Analisis efisiensi industri manufaktur besar dan sedang di Provinsi Jawa Barat," Seminar Akuntansi Indonesia Barat 2 [Online], 1 Desember.

4. 2022. Ulkhaq, M.M., "The determinants of Indonesian students' mathematics performance: An analysis through PISA data 2015 wave," 1st Annual Conference of Education, Culture and Technology, Ternate [Online], 27 November.

5. 2022. Ulkhaq, M.M., "Apakah ICT mempengaruhi nilai sains siswa? Perbandingan antara Indonesia dan Singapura," Seminar Nasional Sanata Dharma Berbagi, Yogyakarta [Online], 26 November.

6. 2022. Ulkhaq, M.M., "Determinan pencapaian siswa bidang matematika: Perbandingan antara Indonesia dan Singapura," Siliwangi Conference on Education, Management, and Agriculture, Tasikmalaya [Online], 24 November.

7. 2022. Ulkhaq, M.M., "Faktor-faktor yang mempengaruhi prestasi bahasa siswa Indonesia: Analisis melalui PISA data 2018," 3rd Wijayakusuma National Conference, Cilacap [Online], 19 November.

8. 2022. Widyoadi, M.A. and Ulkhaq, M.M., "Evaluasi persediaan bahan baku obat dengan metode probabilistic EOQ: Studi kasus pada PT Eka Farma," Seminar Nasional Bisnis Seri 7, Pontianak [Online], 5 November.

9. 2022. Ulkhaq, M.M., "Apakah kepemilikan ICT di rumah mempengaruhi nilai matematika siswa indonesia? Analisis melalui data pisa 2015," Seminar Nasional Pendidikan Biologi Ke-7 [Online], 5 November.

10. 2022. Ulkhaq, M.M., "Hubungan antara logistics performance index dengan corruption perceptions index," Seminar Nasional "Percepatan Pemulihan Ekonomi dan Penguatan Pembangunan Berkelanjutan di Tengah Tantangan Dinamika Global", Jakarta [Online], 19 Oktober.

11. 2022. Ulkhaq, M.M., "Apakah kepemilikan ICT di rumah mempengaruhi nilai sains siswa Indonesia? Analisis melalui data PISA 2015," Konferensi Integrasi Interkoneksi Islam dan Sains Ke-5, Yogyakarta [Online], 4 Oktober.

12. 2022. Ulkhaq, M.M., "Apakah ICT mempengaruhi nilai sains siswa Indonesia? Analisis melalui data PISA 2018," National Seminar on Accounting, Finance, and Economics 8 [Online], 25 Agustus.

13. 2022. Ulkhaq, M.M., "The determinants of Indonesian students' science performance: An analysis through PISA data 2015 wave," Seminar Nasional Biologi IV [Online], 16 Juli.

14. 2022. Ulkhaq, M.M., "Faktor-faktor yang mempengaruhi prestasi siswa Indonesia bidang sains: Analisis melalui OECD PISA Data 2018," Seminar Nasional Inovasi dan Pembaruan Pendidikan 2, Ogan Komering Ulu Timur [Online], 27 Juni.

15. 2021. Handayani, N.U., Wibowo, M.A., Widharto, Y., Ulkhaq, M.M., Sari, D.P., Rinawati, D.I., Wardani, S., Mauliddina, Y., Wijayanto, and Ningsih, L.W., "Peran Logistics 4.0 sebagai penguatan implementasi Industy 4.0," Diseminasi Teknologi Industri TPT [Online], 24 November.

16. 2021. Sari, D.P., Ulkhaq, M.M., Pertiwi, W.N., Wijayanto, and Ningsih, L.W. "Proof of concept digitalisasi sektor perikanan budidaya," National Seminar on Accounting, Finance, and Economics [Online], 22 Juli.

17. 2021. Ulkhaq, M.M., Pertiwi, W.N., Wijayanto, and Ningsih, L.W. "Proof of concept digitalisasi sektor pertanian," Seminar Nasional Politeknik Pembangunan Pertanian Yogyakarta - Magelang [Online], 29 Juni.

18. 2018. Heldianti, R., Pramono, S.N.W., Pamuji, H., and Ulkhaq, M.M., “Perancangan ulang jig untuk peningkatan produktivitas pengecatan pada Mesin PU Base Coat,” Seminar Nasional VII Manajemen dan Rekayasa Kualitas, Bandung, 15 November.

19. 2017. Ulkhaq, M.M., Pramono, S.N.W., and Halim, R., “Aplikasi seven tools untuk mengurangi cacat produk pada mesin communite di PT. Masscom Graphy, Semarang,”Seminar Nasional Pengkajian dan Penerapan Teknologi III, Jakarta, 9 Desember.

20. 2017. Ardhini, M.A. and Ulkhaq, M.M., “Aplikasi metode peralaman ARIMA untuk meramalkan permintaan produk benang di Spinning 4 PT. Apac Inti Corpora, Semarang,” 4th Annual Conference on Industrial & System Engineering, Semarang, 19 Juli.

21. 2017. Putri, D.M. and Ulkhaq, M.M., “Analisis pengendalian persediaan bahan baku kertas duplex 120 gram dengan metode min-max system di PT. Jaya Aflaha, Batam,” 4th Annual Conference on Industrial & System Engineering, Semarang, 19 Juli.

22. 2017. Ulkhaq, M.M. and Pramono, S.N.W., “Penilaian manfaat ekonomi penerapan standar dengan Metodologi ISO: Studi kasus di UMKM Batik XYZ Semarang,” 4th Industrial Engineering Conference, Surakarta, 8 Mei.

23. 2017. Pramono, S.N.W., Pujotomo, D., Ulkhaq, M.M., and Permadi, D.T., “Redesain kemasan makanan ringan olahan pada UMKM Center Jawa Tengah dengan metode Kansei Engineering,” 4th Industrial Engineering Conference, Surakarta, 8 Mei.

24. 2016. Ulkhaq, M.M. and Rasyida D.R., “Aplikasi seven tools dan analisis 5W+1H untuk mengurangi cacat produk galon: studi kasus di PT. Berlina, Tbk., Surabaya,” Seminar Nasional Multi Disiplin Ilmu & Call for Papers UNISBANK Ke-2, Semarang, 28 Juli.

25. 2015. Rasyida, D.R., Ulkhaq, M.M., Setiowati, P.R., and Setyorini, N.A, “Penilaian kualitas pelayanan bandara: kombinasi metode service quality dan importance-performance analysis,” 2nd Annual Conference on Industrial & System Engineering, Semarang, 7 Oktober.

26. 2015. Susanto, N., Nurkertamanda, D., Ulkhaq, M.M., and Panca, K., “Pengembangan standar strategi perakitan produk manufaktur oleh pekerja Indonesia,” 2nd Annual Conference on Industrial & System Engineering, Semarang, 7 Oktober.