Publications

Journal Papers

• Wu, C. H., Dai, Y. Y. and Yang, D. Y.* (2025). Reliability and cost-effectiveness optimization of G-systems with preventive maintenance strategy and unreliable repairman. Applied Mathematical Modelling, 150, 116387. (SCI) (Partially supported by NSTC 112-2221-E-A49-124-MY3)

• Wu, C. H.* and Chang, Y. C. (2025). Modified dynamic process capability with mean shift and variance changes. Quality and Reliability Engineering International, Online. (SCI) (Partially supported by MOST 112-2221-E-A49-124-MY3)

• Hsu, Y. C.* and Wu, C. H. (2025). Application of hotelling’s T2 control chart for real-time quality management of the green tea beverage rapid cooling process. Journal of Food Measurement and Characterization, 19, 5601-5610. (SCI)

• Wu, C. H.* and Wang, K. H. (2025). Multi-objective optimization of retrial warm-standby machine repair system with two failure modes. Quality Technology & Quantitative Management, Online. (SCI)

• Su, R. H., Wu, C. H.* and Shih, T. H. (2025). Conservative profitability estimation using Bayesian approach for a newsboy-type product in supply chain. Annals of Operations Research, Online. (SCI) (Partially supported by NSTC 112-2221-E-A49-124-MY3).

• Su, R. H.*, Hou, C. D., Wu, C. H. and Lin C. I. (2024). Conservative profitability evaluation for a newsboy-type product: Frequentist approach versus Bayesian approach. Journal of Testing and Evaluation, 52(5), 2817-2833. (SCI) (Partially supported by MOST 112-2221-E-A49-124-MY3)

• Wu, C. H., Yang, D. Y.* and Lin, W. L. (2024). Controlling customer arrivals in a system with two waiting areas. Journal of Industrial and Management Optimization, 21(2), 1251-1268. (SCI) (Partially supported by MOST 112-2221-E-A49-124-MY3)

• Wu, C. H., Yang, D. Y.* and Huang, C. L. (2024). Multi-objective optimization of production system with staggered production. International Journal of Production Research, 62(23), 8276-8298. (SCI) (Partially supported by NSTC 112-2221-E-A49-124-MY3)

• Ho, H. Y., Wang, A. H.* and Wu, C. H. (2024). Effects of training methods on performance of scaffolding task for workers with different spatial ability. International Journal of Occupational Safety and Ergonomics, 30(3), 985-994. (SCI)

• Wu, C. H.* and Shu, J. L. (2023). Performance analysis of ticket queues with balking customers and single vacation policy. Queueing Models and Service Management, 7(2), 31-56. (SJR)

• Yang, D. Y.*, Dai Y. Y., Wu, C. H. (2024). Equilibrium balking strategies in unobservable queues with multiple vacations and an optional service. RAIRO-Operations Research, 58, 2569-2589. (SCI) (Partially supported by NSTC 112-2221-E-A49-124-MY3)

• Wu. C. H., Yang, D. Y.* and Ko, M. H. (2024) Performance sensitivity analysis for machine repair problem with two failure modes and working vacation. International Journal of Reliability Quality and Safety Engineering, 31(2), 2350040. (ESCI) (Partially supported by NSTC 112-2221-E-A49-124-MY3)

• Wu, C. H., Huang, W. T., Dang J. F.* and Yeh, M. Y. (2023). Optimal analysis of a multi-server queue with preprocessing time and replenishment inventory. Journal of the Chinese Institute of Engineers, 47(1), 120-132. (SCI)

• Wu, C. H., Yang, D. Y.* and He, T. E. (2023). Matrix-augmentation approach for machine repair problem with generally distributed repair times during working breakdown periods. Mathematics and Computers in Simulation, 225, 1019-1038. (SCI)

• Wu, C. H., Yang, D. Y.* and Yong, C. R. (2023). Performance evaluation and bi-objective optimization for F-policy queue with alternating service rates. Journal of Industrial and Management Optimization, 19(5), 3819-3839. (SCI) (Partially supported by MOST 109-2221-E-009-069-MY3)

• Wang, K. H., Wu, C. H. and Yen, T. C.* (2023). Reliability analysis of a redundant retrial machining system subject to standby switching failure. Quality Technology & Quantitative Management, 20(5), 561-576. (SCI)

• Wu, C. H., Pearn, W. L. and Tai, Y. T.* (2023). Improved profit model for production of MicroLED PCB with asymmetric specifications. Journal of the Operational Research Society, 74(1), 48-58. (SCI)

• Wang, K. H., Yen, T. C. and Wu, C. H.* (2022). Reliability and sensitivity analysis of an unreliable retrial machine repairing system with warm standbys switching failure. International Journal of Reliability Quality and Safety Engineering, 29(4), 2141008. (ESCI)

• Wang, K. H., Wu, C. H. and Yen, T. C.* (2022). Comparative cost-benefit analysis of four retrial systems with preventive maintenance and unreliable service station. Reliability Engineering and System Safety, 222, 108342. (SCI)

• Su, R. H., Wu, C. H.* and Lee, M. H. (2022). Conservative profitability evaluation for newsboy-type products with Bootstrap methods. Quality Technology & Quantitative Management, 19(1), 74-94. (SCI)

• Wu, C. H., Hsu, Y. C.* and Pearn, W. L. (2021). Improved yield estimation with efficient decision power for multi-line processes. Quality Engineering, 33(4), 655-671. (SCI)

• Yen, C. T., Wu, C. H., Wang, K. H.* and Lai, W. P. (2022). Optimization analysis of the F-policy retrial machine repair problem with working breakdowns. International Journal of Industrial and Systems Engineering, 40(2), 200-227. (EI)

• Wu, C. H. and Yang, D. Y.* (2021). Control charts for the expected system size of Markovian queues under F-policy. Quality Technology & Quantitative Management, 18(5), 576-596. (SCI) (Partially supported by MOST 109-2221-E-009-069-MY3)

• Wu, C. H., Yen, T. C. and Wang K. H.* (2021). Availability and comparison of four retrial systems with imperfect coverage and general repair times. Reliability Engineering and System Safety, 212, 107642. (SCI)

• Wu, C. H. and Yang, D. Y.* (2021). Bi-objective optimization of a queueing model with two-phase heterogeneous service. Computers & Operations Research, 130, 105230. (SCI) (Partially supported by MOST 107-2218-E-009-058-MY2)

• Yang, D. Y.*, Chung, C. H. and Wu, C. H. (2021). Sojourn times in a Markovian queue with working breakdowns and delayed working vacations. Computers & Industrial Engineering, 156, 107239. (SCI) (Partially supported by MOST 107-2218-E-009-058-MY2)

• Su, R. H., Wu, C. H. and Yang, D. Y.* (2021). Conservative profitability evaluation for a newsboy-type product based on achievable capacity index. European Journal of Industrial Engineering, 15(2), 250-272. (SCI)

• Yang, D. Y.* and Wu, C. H. (2021). Evaluation of the availability and reliability of a standby repairable system incorporating imperfect switchovers and working breakdowns. Reliability Engineering and System Safety, 207, 107366. (SCI)

• Wu, C. H., Hsu, Y. C.* and Pearn, W. L. (2021). An improved measure of quality loss for notching processes. Quality and Reliability Engineering International, 37(1), 108-122. (SCI)

• Yen, T. C., Wang, K. H.* and Wu, C. H. (2020). Reliability-based measure of a retrial machine repair problem with working breakdowns under the F-policy. Computers & Industrial Engineering, 150, 106885. (SCI) (Partially supported by MOST 107-2218-E-009-058-MY2)

• Wu, C. H.* and Pearn, W. L. (2020). Yield assessment for dynamic etching processes with variance change. IEEE Transactions on Components Packaging and Manufacturing Technology, 10(10), 1745-1753. (SCI)

• Wu, C. H.* (2020). Modified processes capability assessment with dynamic mean shift. Quality and Reliability Engineering International, 36(4), 1258-1271. (SCI)

• Yang, D. Y.*, Chen, Y. H. and Wu, C. H. (2020). Modelling and optimisation of a two-server queue with multiple vacations and working breakdowns. International Journal of Production Research, 58(10), 3036-3048. (SCI)

• Yang, D. Y.*, Ke, J. C. and Wu, C. H. (2020). Randomized control of arrivals in a finite-buffer GI/M/1 system with starting failures. RAIRO-Operations Research, 54(2), 351-367. (SCI)

• Wu, C. H. and Yang, D. Y.* (2020). Dynamic control of a machine repair problem with switching failure and unreliable repairmen. Arabian Journal for Science and Engineering, 45, 2219-2234. (SCI)

• Yang, D. Y.* and Wu, C. H. (2019). Performance analysis and optimization of a retrial queue with working vacations and starting failures. Mathematical and Computer Modelling of Dynamical Systems, 25(5), 463-481. (SCI) (Partially supported by MOST 107-2218-E-009-058-MY2)

• Wu, C. H., Pearn, W. L. and Tai, Y. T.* (2019). An improved manufacturing yield measure for gold bumping processes with very low nonconformities. IEEE Transactions on Components Packaging and Manufacturing Technology, 9(5), 991-997. (SCI)

• Ke, J. C.*, Wu, C. H. and Pearn, W. L. (2017). Dynamic operating policy for the controllable queue with two removable unreliable servers. International Journal of Computer Mathematics: Computer Systems Theory, 2(3), 81-96. (SCI)

• Wu, C. H., Pearn, W. L., Tai, Y. T.* and Lin, P. C. (2017). Lower confidence bounds as precision measure for truncated processes. Communications in Statistics - Simulation and Computation, 46(2), 1461-1480. (SCI)

• Wu, C. H., Lai, P. J., Lee, W. C. and Wang, J. Y.* (2016). Some single-machine scheduling problems with elapsed-time and position-based learning and forgetting effects. Discrete Optimization, 19, 1-11. (SCI)

• Pearn, W. L., Tai, Y. T.* and Wu, C. H. (2016). A note on production yield measure for multiple lines. Quality Technology & Quantitative Management, 13(4), 394-402. (SCI)

• Pearn, W. L., Wu, C. H.* and Chuang, C. C. (2016). An effective powerful test for one-sided supplier selection problem with multiple independent characteristics. Quality Technology & Quantitative Management, 13(2), 182-196. (SCI)

• Yang, D. Y.* and Wu, C. H. (2015). Cost-minimization analysis of a working vacation queue with N-policy and server breakdowns. Computers & Industrial Engineering, 82, 151-158. (SCI)

• Ke, J. C., Liu, T. H. and Wu, C. H.* (2015). An optimum approach of profit analysis on the machine repair system with heterogeneous repairmen. Applied Mathematics and Computation, 253, 40-51. (SCI)

• Pearn, W. L., Wu, C. C. and Wu, C. H.* (2015). Estimating process capability index Cpk: classical approach versus Bayesian approach. Journal of Statistical Computation and Simulation, 85(10), 2007-2021. (SCI)

• Wu, C. H.* and Pearn, W. L. (2015). Estimating process precision index Cp with various sample types: A practical implementation. Journal of Testing and Evaluation, 43(4), 906-916. (SCI)

• Wu, C. H., Lai, P. J. and Lee, W. C.* (2015). A note on single-machine scheduling with sum-of-processing-time-based learning and forgetting effects. Applied Mathematical Modelling, 39(2), 415-424. (SCI)

• Wu, C. H.*, Pearn, W. L. and Chuang, C. C. (2015). A powerful test for two-sided multiple independent characteristics supplier selection problem. Journal of Statistical Computation and Simulation, 85(4), 839-853. (SCI)

• Yang, D. Y.*, Wu, C. H. and Ke, J. C. (2015). The multi-server retrial system with Bernoulli feedback and starting failures. International Journal of Computer Mathematics, 92(5), 954-969. (SCI)

• Wu, C. H., Lee, W. C., Ke, J. C. and Liu, T. H. (2014). Optimization analysis of an unreliable multi-server queue with a controllable repair policy. Computers & Operations Research, 49, 83-96. (SCI)

• Wu, C. H., Lin, S. J., Yang, D. L. and Pearn, W. L. (2014). Box-Cox transformation approach for evaluating non-normal processes capability based on Cpk index. Journal of Testing and Evaluation, 42(4), 949-961. (SCI)

• Hsu, Y. L., Ke, J. C., Liu, T. H. and Wu, C. H. (2014). Modeling of multi-server repair problem with switching failure and reboot delay and related profit analysis. Computers & Industrial Engineering, 69, 21-28. (SCI)

• Wu, C. H. and Ke, J. C. (2014). Multi-server machine repair problems under a (V, R) synchronous single vacation policy. Applied Mathematical Modelling, 38(7-8), 2180-2189. (SCI)

• Pearn, W. L., Wu, C. H. and Chuang, C. C. (2014). Product acceptance determination for processes with multiple independent lines. Quality and Reliability Engineering International, 30(7), 1075-1082. (SCI)

• Pearn, W. L., Wu, C. H. and Chuang, C. C. (2014). An effective procedure for supplier selection applied to glass substrate processes with multiple lines. Journal of Testing and Evaluation, 42(6), 1458-1465. (SCI)

• Wu, C. H. and Ke, J. C. (2013). Multi-threshold policy for a multi-server queue with synchronous single vacation. Mathematical and Computer Modelling, 57, 1122-1130. (SCI)

• Pearn, W. L., Tai, Y. T., Wu, C. H. and Chuang, C. C. (2013). Analytic solution to product acceptance determination for gold bumping process with multiple manufacturing lines. IEEE Transactions on Components, Packaging and Manufacturing Technology, 3(11), 1980-1986. (SCI)

• Ke, J. C., Wu, C. H. and Zhang, Z. G. (2013). A note on a multi-server queue with vacations of multiple groups of servers. Quality Technology & Quantitative Management, 10(4), 513-525. (SCI)

• Pearn, W. L. and Wu, C. H. (2013). A close form solution for the product acceptance determination based on the popular index Cpk. Quality and Reliability Engineering International, 29(5), 719-723. (SCI)

• Ke, J. C., Wu, C. H. and Pearn, W. L. (2013). Analysis of an infinite multi-server queue with an optional service. Computers & Industrial Engineering, 65(2), 216-225. (SCI)

• Pearn, W. L. and Wu, C. H. (2013). Supplier selection for processes with multiple characteristics based on testing capability index Cpk. Journal of Testing and Evaluation, 41(4), 534-540. (SCI)

• Wu, C. H., Ke, J. C. and Choudhury, G. (2013). Analysis of the machine repair models with multi-threshold synchronous vacations. Journal of Testing and Evaluation, 41(3), 34-41. (SCI)

• Pearn, W. L. and Wu, C. H. (2013). Supplier selection for multiple-characteristics processes with one-sided specifications. Quality Technology & Quantitative Management, 10(1), 133-140. (SCI)

• Pearn, W. L., Wu, C. H., Hung, H. N. and Kao, C. M. (2013). An extension of the product acceptance determination for one-sided process with multiple characteristics. Quality and Reliability Engineering International, 29(2), 277-284. (SCI)

• Pearn, W. L., Wu, C. H. and Tsai, M. C. (2013). A note on capability assessment for processes with multiple characteristics: A generalization of the popular index Cpk. Quality and Reliability Engineering International, 29(2), 159-163. (SCI)

• Pearn, W. L. and Wu, C. H. (2013). Measuring PPM non-conformity for process with asymmetric tolerances. Quality and Reliability Engineering International, 29(3), 431-435. (SCI)

• Ke, J. C., Wu, C. H. and Pearn, W. L. (2013). A heuristic algorithm for the optimization of a retrial system with Bernoulli vacation. Optimization, 62(3), 299-321. (SCI)

• Pearn, W. L. and Wu, C. H. (2013). Supplier selection critical decision values for processes with multiple independent lines. Quality and Reliability Engineering International, 29(6), 899-909. (SCI)

• Wu, C. H., Wang, K. H., Ke, J. C. and Ke, J. B. (2012). A heuristic algorithm for the optimization of M/M/s queue with multiple working vacations. Journal of Industrial and Management Optimization, 8(1), 1-17. (SCI)

• Pearn, W. L. and Wu, C. H. (2012). Implementation of evaluating process capability index Cpk for processes with multiple characteristics. Journal of Testing and Evaluation, 40(4), 643-654. (SCI)

• Ke, J. C. and Wu, C. H. (2012). Multi-server machine repair model with standbys and synchronous multiple vacation. Computers & Industrial Engineering, 62(1), 296-305. (SCI)

• Ke, J. C., Wu, C. H. and Pearn, W. L. (2011). Multi-server retrial queue with second optional service: Algorithmic computation and optimization. International Journal of Systems Science, 42(10), 1755-1769. (SCI)

• Ke, J. C., Wu, C. H., Liou, C. H. and Wang, T. Y. (2011). Cost analysis of a vacation machine repair model. Procedia – Social and Behavioral Sciences, 25, 246-256.

• Ke, J. C., Wu, C. H. and Pearn, W. L. (2011). Algorithmic analysis of the multi-server system with a modified Bernoulli vacation schedule. Applied Mathematical Modelling, 35(5), 2196-2208. (SCI)

• Ke, J. C., Wu, C. H. and Pearn, W. L. (2011). Notes on the computation of Laplace-Stieljes transform for Lognormal and Weibull. Mathematical and Computational Applications, 16(3), 641-648. (EI)

• Wu, C. H. and Ke, J. C. (2010). Computational algorithm and parameter optimization for a multi-server system with unreliable servers and impatient customers. Journal of Computational and Applied Mathematics, 235(3), 547-562. (SCI)

• Yang, D. Y., Wang, K. H. and Wu, C. H. (2010). Optimization and sensitivity analysis of controlling arrivals in the queueing system with single working vacation. Journal of Computational and Applied Mathematics, 234(2), 545-556. (SCI)

• Ke, J. C., Wu, C. H. and Zhang, Z. G. (2010). Recent developments in vacation queueing models: A short survey. International Journal of Operations Research, 7(4), 3-8.

Conference

• Wu, C. H. and Lee Y. C. (2025). Control charts on queueing length of service system with general service time and startup threshold. 2025 IEEE 12th International Conference on Industrial Engineering and Applications (ICIEA 2025), Seoul, Korea.

• Wu, C. H., Wang, C. Y. and Yang, D. Y. (2025). Performance evaluation of a multi-phase service queueing system with delayed vacation. 2025 IEEE 12th International Conference on Industrial Engineering and Applications (ICIEA 2025), Seoul, Korea.

• Yen, T. C., Lai, W. P., Wang, K. H. and Wu, C. H. (2025). Cost optimization analysis of retrial machine repair problem with warm standby components and imperfect coverage. International Conference on Operations Research and Enterprise Systems, Porto, Portugal.

• Wu, C. H., Dai, Y. Y. and Yang, D. Y. (2024). Availability characteristics of repairable systems with two types of components and working breakdown. The 11th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2024), Nagoya City, Japan

• Wu, C. H., Li, P. W. and Yang, D. Y. (2024). Reliability analysis for multi-machine system with heterogeneous failure modes and unstable repairman. The 11th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2024), Nagoya City, Japan

• Wu, C. H., Yang, Y. J. and Yang, D. Y. (2024). Performance analysis of a passenger-taxi service system with two types of passenger groups. The 11th International Conference on Industrial Engineering and Applications (ICIEA 2024), Hiroshima, Japan.

• Wu, C. H., Yang, D. Y. and Ko, M. H. (2023). Evaluating the machine availability of machine repair problem with two failure modes under working vacation policy. 28th ISSAT International Conference on Reliability & Quality in Design, San Francisco, California, USA.

• 巫佳煌、蔡永渝 (2023). 具有 N 方策與不完美服務之服務系統績效分析. 2023 第十九屆台灣作業研究學會年會暨國際研討會, Taiwan.

• Wu, C. H. (2022). Comparison of conservative yield evaluation methods for processes with very low nonconformities. 2022 IEEE 9th International Conference on Industrial Engineering and Applications, Sanya, China.

• Yang, D. Y. and Wu, C. H. (2022). Bi-objective Optimization of a machine repair problem with switching failure and delayed repair under working breakdown condition. 2022 IEEE 9th International Conference on Industrial Engineering and Applications, Sanya, China.

• Ho, H. Y., Wang, A. H., and Wu, C. H. (2022). Effects of training methods on performance of Scaffolding task for workers with different spatial abilities. The 29th Ergonomics Society of Taiwan Annual Meeting and Conference, Taiwan.

• Wu, C. H., Yang, D. Y. and Huang, Z. L. (2021). Performance analysis of queueing system with heterogeneous service rates and service order strategy. The 2021 International Conference of Annual Meeting of the Operations Research Society of Taiwan, Taiwan.

• Wu, C. H. and Chang, Y. C. (2021). Capability adjustment for dynamic processes with mean shift and variance change. The 2021 International Conference of Annual Meeting of the Operations Research Society of Taiwan, Taiwan.

• Wu, C. H., Yang, D. Y. and Hsu, Y. M. (2020). Analysis of GI/M/1/N queue with hybrid vacation schemes. The 2020 International Conference of Annual Meeting of the Operations Research Society of Taiwan, Taiwan.

• Wu, C. H., Yang, D. Y. and Yong, C. R. (2020). The analysis of GI/M/1/K queuing system with F-policy and heterogeneous service rates. The 2020 International Conference of Annual Meeting of the Operations Research Society of Taiwan, Taiwan.

• Pearn, W. L., Huang, S. H. and Wu, C. H. (2020). Performance evaluation of skewed process capability index Cs under Lognormal distribution. The 2020 International Conference of Annual Meeting of the Operations Research Society of Taiwan, Taiwan.

• Pearn, W. L., Wu, S. T. and Wu, C. H. (2020). Performance evaluation of non-normal process capability index CNpk under Lognormal distribution. The 2020 International Conference of Annual Meeting of the Operations Research Society of Taiwan, Taiwan.

• Yang, D. Y. and Wu, C. H. (2020). Performance evaluation of a machine interference problem with multiple vacations and delayed repair. The 2nd International Conference on Management Science and Industrial Engineering, Japan. (Withdraw due to coronavirus)

• Wu, C. H. and Yang, D. Y. (2020). Improved profit model with efficient yield assessment and demand uncertainty. The 2nd International Conference on Management Science and Industrial Engineering, Japan. (Withdraw due to coronavirus)

• Su, R. H. and Wu, C. H. (2019). Sensitivity analysis of conservative profitability evaluation on newsboy-type product with normally distributed demand. The 6th International Conference on Industrial Engineering and Applications, Japan.

• Wu, C. H., Lee, W. C. and Ke, J. C. (July 30-Aug. 2, 2013). An unreliable queue with controllable repair policy. The Eighth International Conference on Queueing Theory and Network Applications (QTNA 2013), Taiwan.

• Yang, D. Y. and Wu, C. H. (Jul, 03-05, 2012). Cost analysis of the working vacation queue with N-policy and server breakdowns. International Conference on Business and Information 2012, Japan.

• Ke, J. C., Wu, C. H., Liou, C. H. and Wang, T. Y. (Jan, 23-25, 2011). Cost analysis of a vacation machine repair model. 2011 International Conference on Asia Pacific Business Innovation & Technology Management, Indonesia.

• Ke, J. C. and Wu, C. H. (Mar. 6-7, 2010). Multi-threshold policy for a multi-server queue with a synchronous single vacation. 9th Conference on Application Probability, Taiwan.

• Ke, J. C., Wu, C. H. and Pearn, W. L. (July 30-Aug. 2, 2008). An M/M/R queue with second optional service channel. The Third Asia-Pacific Symposium on Queueing Theory and Network Applications (QTNA 2008), Taiwan.

• Wu, C. H., Wang, K. H., Ke, J. C. and Ke, J. B. (2007). Cost analysis of M/M/R queue with multiple working vacation. Operations Research Society of Taiwan Conference 2007 INFORMS, Taiwan Chapter 2007 Annual Meeting, Taiwan.

Books

• 羅文陽(2024)。統計學；普林斯頓。 (審閱)

• 羅文陽(2024)。統計學入門；普林斯頓。 (審閱)

• 巫佳煌‧唐麗英‧黎正中(譯)(2023)。實驗設計與分析(Montgomery : Design and Analysis of Experiments 10/E)(精華版)；WILEY/高立。

• 黃文佐‧巫佳煌‧鄧志峰(2023)。品質管理－品管大數據應用；普林斯頓。