April 2025:  Top 0.05% of all scholars worldwide according to the most recent 2024 ScholarGPS rankings. Tilburg University | Institution Profiles and Rankings | ScholarGPS 

April 2024:  Ranked #776 in the world and #3 in the  Netherlands, by Research.com in its 2023 Edition of Ranking of Best Scientists in the field of Mathematics 

 December 2021: Journal of the Operating Research Society Outstanding Reviewer 2021

May 2017: "IISE Transactions 2017 Operations Engineering & Analytics Best Paper Award" for Ihsan Yanikoglu, Dick den Hertog, and Jack Kleijnen "Robust dual-response optimization"

February 2008:Knight in the Order of the Netherlands Lion by Her Majesty Beatrix, Queen of the Netherlands

September 2005: INFORMS Simulation Society Lifetime Professional Achievement Award

December 2005: Winter Simulation Conference 2005: "'Tribute to Jack Kleijnen" and "Titans of Simulation"

September 2005: "2004 Meritorious Service Award" from the INFORMS flagship journal

"Operations Research" (the only time that a person has received this award two years in a row)

August 2004: "2003 Meritorious Service Award" from the INFORMS flagship publication

"Operations Research"

August 2002: Grant from the Netherlands Organization for Scientific Research (NWO) for a one-month visit by Dr. Inci Batmaz (Middle East Technical University, Ankara) to work on 'Design of experimentswith simulation models analyzed through kriging'.

December 1999 and 1998: Traveling grants from the Royal Netherlands Academy of Arts and Sciences (KNAW) for attending the Winter Simulation Conferences in Phoenix and Washington, D.C.

May 1999: Visiting Erskine Fellowship, Department of Management, University of Canterbury, Christchurch, New Zealand

January - May 1999: Grant from the Netherlands Organization for Scientific Research (NWO) for a five-month visit to Tilburg University by prof. William Biles (Louisville University, Kentucky) to work on'Development of a Java-based control system for web-based simulation'.

1997: One month- lecture tour to China; awarded by Royal Netherlands Academy of Arts and Sciences (KNAW) and Chinese State Science and Technology Commission (SSTC) (awarded, but not accepted)

December 1996- December 1998: Project Coordinator for the project on 'Sensitivity analysis for improved simulation modeling', NATO Collaborative Research Grants Programme, together with ProfessorRussell Cheng of The University of Kent, Canterbury, United Kingdom.

November 8- December 5, 1996: consultant for the Waste Isolation Pilot Plant (WIPP), Sandia National Laboratories, Albuquerque, New Mexico.

June- August 1995: Fulbright Scholar Grant from the Netherlands America Commission for Educational Exchange (NACEE) for three months of research with professors R. Barton (Pennsylvania StateUniversity) and L. Schruben (Cornell University) (awarded, but not accepted)

April1994: Traveling grant from The British Council and the Netherlands Organization for Scientific Research (NWO) for a visit to Professor R. Cheng (University of Wales)

July 23-26, 1989: Traveling grant from the Royal Netherlands Academy of Arts and Sciences (KNAW) for attending the International TIMS Conference in Osaka, Japan (awarded, but not accepted)

July 1988: Supercomputer Visiting Scientist Program, Rutgers University, The State University of New Jersey

July 1981- August 1981: World Trade IBM Summer Faculty Program at the Thomas J Watson Research Center in Yorktown Heights (N.Y.)

May 1977: Grant under the exchange program for professors, Belgian-Dutch cultural agreement 1976-1977, at the invitation of Prof. P. Wilmes in Louvain

Jan.- May 1977: Joint research with Professor R. Welke (McMaster University, Canada), sponsored by NWO (then called ZWO)

Honorable Mention, Lanchester Prize 1975, Operations Research Society of America, for the book "Statistical techniques in simulation", Dekker, New York, 1974-1975

Dec. 1973- Dec. 1974: Scholarships from ZWO and from IBM for study on cost/benefit analysis of information systems at the IBM Research Laboratory in San Jose, California

Martin Balzola Award 1973 from Instituto. Nacional de Racionaliaci6n y Normalizaci6n, Madrid (Spain) for the paper on "Computers and Management Science: their interface to-day and to-morrow"

July 1973: Grant from Albert Heijn Cy. in Zaandam (Netherlands) for study on "inventory systems for the grocery retail trade"

Nov. 1971: Traveling grant from British Council for a visit to professors D. Cox (Imperial College, London) and K. Tocher (British Steel, Birmingham)

Nov. 1968: T.A.E.K. (Tilburg Academic Economics Circle) Prize for paper on "Increasing the reliability of estimates in the simulation of systems: negative and positive correlation between runs"

Sept. 1967- Sept. 1968: Fellowship from ZWO for study at the University of California in Los Angeles (UCLA)'s Graduate School of Business Administration (GBSA)