Pairwise ratio matrices; Pairwise comparisons; Geometric mean aggregation; Theory and applications of multiple criteria decision making;
Goal programming in classification and preference ordering; Analytical hierarchy process; Inventory management.
Refereed Journal Publications with ISI citations (1,431 total ISI citations & 3,231 Scholar Google citations on December 14, 2024)
38. W.C. Wedley, E.U. Choo and Wijnmalen DJD, "Efficacy Analysis of Ratios from Pairwise Comparisons," Fundamenta Informaticae, Vol. 146, 2016, 321-338 (1 citation ISI & 5 citations Google).
37. E.U. Choo, W.C. Wedley and Wijnmalen DJD, "Mathematical Support for the Geometric Mean when Deriving a Consistent Matrix from a Pairwise Ratio Matrix," Fundamenta Informaticae, Vol.144, 2016, 263-278 (3 citations ISI & 3 citations Google).
36. W.C. Wedley and E.U. Choo, "Multi-Criteria Ratios: What is the Unit?" Journal of Multi-Criteria Decision Analysis, Vol.19, 2011, 161-171 (9 citations Google).
35. E.U. Choo and W.C. Wedley, "Estimating Ratio Scale Values when Units are Unspecified," Computers and Industrial Engineering Journal, Vol.59, 2010, 200-208 (6 citations ISI & 11 citations Google).
34. W.C. Wedley and E.U. Choo, "Sharing the Pie and Distributing the Reward: A Case of Bonus Distribution Among Executives," Journal of Multi-Criteria Decision Analysis, Vol.15, 2009, 151-162 (1 citation Google).
33. G. Bajwa, E.U. Choo and W.C. Wedley, "Effectiveness Analysis of Deriving Priority Vectors from Reciprocal Pairwise Comparison Matrices," Asian Pacific Journal of Operational Research, Vol.24, 2008, 279-299 (33 citations ISI & 53 citations Google).
32. E.U. Choo and W.C. Wedley, "Comparing Fundamentals of Additive and Multiplicative Aggregation in Ratio Scale MCDM," The Open Operational Research Journal, Vol.2, 2008, 1-7 (53 citations Google).
31. E.U. Choo and W.C. Wedley, "A Common Framework for Deriving Priority Vectors from Pairwise Comparison Matrices," Computer & Operations Research, Vol.31, 2004, 893-908 (204 citations ISI & 399 citations Google).
30. W.C. Wedley, E.U. Choo and B. Schoner, "Magnitude Adjustments for AHP Benefit/Cost Ratios," European Journal of Operational Research, Vol.133, 2001, 342-351 (32 citations ISI & 121 citations Google).
29. E.U. Choo, B. Schoner and W.C. Wedley, "Interpretation of Criterion Weights in Multiple Criteria Calibration," Computers and Industrial Engineering Journal. Vol.37, 1999, 527-541 (186 citations ISI & 402 citations Google).
28. G.H. Chan, Z.H. Xia and E.U. Choo, "The Critical Cut-Off Value Heuristic for Dynamic Lot Sizing Problems with Time Varying Cost Parameters," Computer & Operations Research., Vol.26(2), 1999, 179-188 (1 citation ISI & 3 citations Google).
27. B. Schoner, E.U. Choo and W.C. Wedley, "Values - What is the Solutions?" Journal of Multi-Criteria Decision Analysis, Vol.8, 1999, 24-26.
26. G.H. Chan and E.U. Choo, "Extensions of Simple Eyeballing Dynamic Lot Sizing Heuristics," Computer & Operations Research, Vol.25(6), 1998, 487-497 (4 citations Google).
25. J.W. Moy, K.F. Lam and E.U. Choo, "Deriving the Partial Values in MCDM by Goal Programming," Annals of Operations Research, Vol.74, 1997, 277-288 (5 citations ISI & 5 citations Google).
24. K.F. Lam, E.U. Choo and J.W. Moy, "Minimizing Deviations from Group Mean: A New Linear Programming Approach for the Classification Problem," European Journal of Operational Research, Vol.88, 1996, 358-376 (43 citations ISI & 69 citations Google).
23. K.F. Lam and E.U. Choo, "Goal Programming in Preference Decomposition," Journal of Operational Research Society, Vol.46, 1995, 205-213 (7 citations ISI & 28 citations Google).
22. W.C. Wedley, B. Schoner and E.U. Choo, "Clustering, Dependence and Ratio Scales in AHP:Rank Reversals and Incorrect Priorities with a Single Criterion," Journal of Multi-Criteria Decision Analysis, Vol.2, 1993, 145-158 (2 citations ISI & 24 citations Google).
21. K.F. Lam and E.U. Choo, "Linear Goal Programming in Classification with Non-Monotone Attribute," Computer & Operations Research, Vol.20, 1993, 403-408 (7 citations ISI & 13 citations Google).
20. B. Schoner, W.C. Wedley and E.U. Choo, "A Unified Approach to AHP with Linking Pins," European Journal of Operations Research, Vol.64, 1993, 384-392 (54 citations ISI & 144 citations Google).
19. K.F. Lam, E.U. Choo and W.C. Wedley, "Goal Programming for Estimation of Classification Probability," European Journal of Operations Research, Vol.67, 1993, 101-110 (11 citations ISI & 15 citations Google).
18. R.J. Macdonald, S.G. Mattar and E.U. Choo, "Procurement Process: Decision by Exclusion and Pairwise Comparisons," OMEGA, Vol.20(5), 1992, 705-712 (3 citation ISI & 5 citations Google).
17. H. Hsieh, K.F. Lam and E.U. Choo, "Comparative Study of Dynamic Lot Sizing with Backlogging," Computers & Operations Research, Vol.19(5), 1992, 393-407 (4 citations ISI & 11 citations Google).
16. B. Schoner, W.C. Wedley and E.U. Choo, "A Rejoinder to Foreman on AHP, with Emphasis on the Requirements of Composite Ratio Scale," Decision Sciences, Vol.23(2), 1992, 509-517 (19 citations ISI & 34 citations Google).
15. E.U. Choo and G.H. Chan, "Two-Way Eyeballing Heuristics in Dynamic Lot Sizing with Backlogging," Computers & Operations Research, Vol.17(4), 1990, 359-363 (3 citations ISI & 12 citations Google).
14. E.U. Choo and G.H. Chan, "Eyeballing Heuristics for Dynamic Lot Sizing Problem," Computers & Operations Research, Vol.16(3), 1989, 189-193 (6 citations ISI & 10 citations Google).
13. E.U. Choo and C.H. Kim, "One-dimensional Simplex Search," Computers & Operations Research, Vol.14, 1987, 47-54 (2 citations ISI).
12. E.U. Choo and W.C. Wedley, "Optimal Criterion Weights in Repetitive Multicriteria Decision-Making," Journal of Operational Research Society, Vol.36(11), 1985, 983-992 (83 citations ISI & 154 citations Google).
11. E.U. Choo, S. Schaible and K.P. Chew, "Connectedness of Efficient Set in Three Criteria Quasiconcave Programming", Cahiers du Centre d'Etudes de Recherche Operationelle, Vol.27, 1985, 213-223. (12 citations ISI & 46 citations Google)
10. E.U. Choo and K.P. Chew, "Optimal Value Functions in Parametric Programming", Zeitschrift fur Operations Research, Vol.29, 1985, 47-57 (2 citations ISI & 5 citations Google).
9. E.U. Choo, "Proper Efficiency and the Linear Fractional Vector Maximization Problem," Operations Research, Vol.32(1), 1984, 216-220 (10 citations ISI & 46 citations Google).
8. K.L. Chew and E.U. Choo, "Pseudolinearity and Efficiency," Mathematical Programming, Vol.28(2), 1984, 226-239 (66 citations ISI & 131 citations Google).
7. E.U. Choo and D.R. Atkins, "Proper Efficiency in Nonconvex Multicriteria Programming," Mathematics of Operations Research, Vol.8(3), 1983, 467-470 (42 citations ISI & 90 citations Google).
6. R.E. Steuer and E.U. Choo, "An Interactive Weighted Tchebycheff Procedure for Multiple Objective Programming," Mathematical Programming, Vol.26(3), 1983, 326-344 (428 citations ISI & 963 citations Google).
5. E.U. Choo and D.R. Atkins, "Connectedness in Multiple Linear Fractional-Programming," Management Science, Vol.29(2), 1983, 250-255 (34 citations ISI & 69 citations Google).
4. E.U. Choo and D.R. Atkins, "Bicriteria Linear Fractional-Programming," Journal of Optimization Theory and Applications, Vol.36(2), 1982, 203-220 (46 citations ISI & 104 citations Google).
3. E.U. Choo and D.R. Atkins, "An Interactive Algorithm for Multicriteria Programming," Computers & Operations Research, Vol.7(1-2), 1980, 81-87 (43 citations ISI & 114 citations Google).
2. I. Zang, E.U. Choo and M. Avriel, "Functions Whose Stationary Points Are Global Minima," Journal of Optimization Theory and Applications, Vol.22(2), 1977, 195-208 (18 citations ISI & 38 citations Google).
1. I. Zang, E.U. Choo and M. Avriel, "Note On Functions Whose Local Minima Are Global," Journal of Optimization Theory and Applications, Vol.18(4), 1976, 555-559 (15 citations ISI & 29 citations Google).
Earlier Refereed Journal Publications with ISI citations
3. E.U. Choo, "Note on Subring of C*(X)", Canadian Mathematical Bulletin, 1977, 47-52 (2 citations ISI).
2. E.U. Choo, "Accumulation points of Continuous Functions and Compactifications", Canadian Mathematical Bulletin, 1975, 177-179 (1 citation ISI).
1. E.U. Choo and H.H. Teh, "Graph Connectedness," Nantah Mathematica, 1974, 11-12.
Final Research Grant
$46,800 NSERC grant, 2005-2009. "Issues in Preference Calibration under Multiple Criteria".
Conferences and Workshops
INFORMS 2009 San Diego, California, October 11-14, 2009.
IFORS 2008 Conference, Sandton, South Africa, 14 -18 July 2008.
19th International Conference on Multiple Criteria Decision Making, Auckland, New Zealand, January 7-12, 2008, Session Chair.
INFORMS Annual Meeting Seattle 2007, Washington, November 4-7, 2007.
Nineth International Symposium of AHP 2007, Vina del Mar, Chile, August 3-7, 2007.
INFORMS International Conference Puerto Rico 2007, July 8-11, 2007, Multicriteria Decision Making.
18th International Conference on Multiple Criteria Decision Making 2006, Chania, Crete, Greece, June 19-23, 2006, Session Chair.
INFORMS Annual Teaching of Management Science Workshop 2005, Lake Bluff, Illinois, July 28-31, 2005.
ICSC 2005, International Conference on Scientific Computing, Nanjing, China, June 4-8, 2005.
CORS Conference 2005, Halifax, Nova Scotia, Canada, May 16-18, 2005.
17th International Conference on Multiple Criteria Decision Making 2004, Whistler, B.C., Canada, August 6-11, 2004, Session Chair.
INFORMS Conference on OR/MS Practice 2004, Boston, Massachusetts, April 25-27, 2004.
Reseach colloboration and invited seminar in National University of Singapore (NUS), Singapore, March 27-April 7, 2003.
INFORMS-CS Winter Simulation Conference 2002, WSC'02, San Diego, California, December 8-11, 2002.
INFORMS Annual Meeting San Jose 2002, California, November 17-20, 2002.
56th Meeting of the European Working Group, Multiple Criteria Decision Aiding 2002, Coimbra, Portugal, October 3-5, 2002.
INFORMS International Hawaii Conference 2001, Maui, Hawaii, May, 2001. Special Session, Multicriteria Decision Making.
Teaching Effectiveness Colloquium, INFORMS Cincinnati Conference 1999, Cincinnati, Ohio, May 2-5, 1999.
INFORMS Seattle Conference 1998, Seattle, Washington, October 25-28, 1998.
EURO XV - INFORMS XXXIV Conference 1997, Barcelona, Spain, July, 1997 (with B. Schoner and W. Wedley).
INFORMS San Diego Conference 1997, San Diego, California, May 1997 (with B. Schoner and W.C. Wedley).
Fourth International Symposium of AHP 1996, SFU, July 1996 Session Chair.
INFORMS Atlanta Conference 1996, Atlanta, Georgia, November 2-6, 1996.
TIMS XXXIII Singapore Conference 1995, Singapore, June 25-28, 1995, Cluster Chair.
Review Services
Associate Editor, Asian Pacific Journal of Operational Research published by World Scientific. (1999 - 2009)
Editorial Board member, Computers & Operations Research, An International Journal, Pergamon Press. (1990 – 2002)
Ad hoc Reviewer: Annal of Operations Research, European Journal of Operational Research, OMEGA, Operations Research, Infor, Journal of Optimization Theory and Applications.