Centre for Excellence in Operations (CEO)

Publications by CEO Associates


2012 Publications

Sorkhab, M.D., B.Kolfal, and A. Ingolfsson. (2012). Maximizing Throughput in Finite-Source Parallel Queue Systems, European Journal of Operational Research (EJOR), 217, 554-559.


2011 Publications

Iravani, S.M.R., B. Kofal, and M.P. Van Oyen, (2011), "Capability Flexibility: A Decision Support Methodology for Parallel Service and Manufacturing Systems with Flexible Servers," IIE Transactions   43, 363-382

Sagahfian, S., M.P. Van Oyen, and B. Kofal. (2011). The 'W' Network and the Dynamic Control of Unreliable Flexible Servers, IE Transactions  43, 893-907.


2010 Publications

Castillo, I., A. Ingolfsson, T. Sim. (2010). Socially optimal location of facilities with fixed servers, stochastic demand, and congestion. Production and Operations Management 18(6) 721-736.

Day, T. E., M. W. Li, A. Ingolfsson, N. Ravi. (2010). The use of queueing and simulative analyses to improve an overwhelmed pharmacy call center. Journal of Pharmacy Practice 23(5) .

Erdogan, G., E. Erkut, A. Ingolfsson, G. Laporte. (2010). Scheduling ambulance crews for maximum coverage. Journal of the Operational Research Society 61(4) 543-550.

Ingolfsson, A., F. Campello, X. Wu, E. Cabral. (2010). Combining integer programming and the randomization method to schedule employees. European Journal of Operational Research 202 153-163.

Budge, S., A. Ingolfsson, D. Zerom. (2010). Empirical analysis of ambulance travel times: The case of Calgary Emergency Medical Services. Management Science 56(4) 716-723.

Rolland, E., R. Patterson, K.F. Ward, and B. Dodin. (2010). Decision Support For Disaster Management. Operations Management Research, (in press).

Rejoinder to Commentary: Rolland, E., R. Patterson and  K.F. Ward. (2010). Boundary Decision, Embededness, and the Co-Creation of Value: Authors  Response to Invited Commentary. Canadian Journal of Administrative Sciences, forthcoming.

Ingolfsson, A. 2010. Ice Hockey. Wiley Encyclopedia of Operations Research and Management Science, accepted for publication.


2009 Publications

Castillo, I., T. Joro and Y. Li. (2009). Workforce Scheduling with Multiple Ojectives. European Journal of Operational Research 196, 162-170

Budge, S., A. Ingolfsson, E. Erkut. (2009). Approximating vehicle dispatch probabilities for emergency service systems with location-specific service times and multiple units per location. Operations Research 57, 251-255 [supplement]

Erkut, E., A. Ingolfsson, T. Sim, G. Erdogan. (2009). Computational comparison of five maximal covering models for locating ambulances. Geographical Analysis, 41, 43-65.

Ingolfsson, A., E. Cabral, F. Campello, X. Wu. (2009). Combining integer programming and the randomization method to schedule employees. [Supplement: Additional computational results] European Journal of Operational Research, in press.

Arazy,Ofer, Ian Gellatley, Soobaek Jang, and Raymond A. Patterson. (2009).“Wiki Deployment in Corporate Settings: A Case Study”, Forthcoming, IEEE Technology and Society Magazine.

Rolland, E., R. Patterson, and K.F. Ward. (2009). Dynamic Capabilities and e-Service. Canadian Journal of Administrative Sciences, Vol. 26, No. 4 pp. 301-315.

Ingolfsson, A. (2009). Ice Hockey. Wiley Encyclopedia of Operations Research and Management Science, accepted for publication.


2008 Publications

Budge, S., A. Ingolfsson, E. Erkut. (2008). Optimal ambulance location with random delays and travel times. Health Care Management Science 11 262-274.

Castillo, I., A. Ingolfsson, and T. Sim. (2008). Socially Optimal Location of Facilities with Fixed Servers, Stochastic Demand and Congestion.  Production and Operations Management, forthcoming.

Erdogan, G, E. Erkut, A. Ingolfsson. (2008). Ambulance deployment for maximum survival.  Naval Research Logistics 55 42-58.

Erdogan, G., E. Erkut, A. Ingolfsson, G. Laporte. (2008). Scheduling ambulance crews for maximum coverage.  Journal of the Operational Research Society, forthcoming.

Erkut, E, A. Ingolfsson, S. Budge. (2008). Maximum availability/reliability models for selecting ambulance station and vehicle locations: a critique [submitted, last revised May 2008]

Erkut, E., A. Ingolfsson, G. Erdogan. (2008). Ambulance deployment for maximum survival. Naval Research Logistics 55 42-58.

Erkut, E., A. Ingolfsson, T. Sim, G. Erdogan. (2008) Computational comparison of five maximal covering models for locating ambulances. Geographical Analysis, forthcoming.

Grassmann, W. K., M. L. Puterman, P. L'Ecuyer, A. Ingolfsson. (2008). Four Canadian contributions to stochastic modeling. INFOR 46 3-14.

Gzara, F., E. Erkut. (2008). A Lagrangian relaxation approach to large-scale flow interception problems. European Journal of Operational Research, forthcoming.


2007 Publications

Bekta, T. J.-F. Cordeau, E. Erkut, G. Laporte. (2007). Exact algorithms for the joint object placement and request routing problem in content distribution networks, Computers & Operations Research, forthcoming.

Cabral, E. A., E. Erkut, G. Laporte, R. A. Patterson. (2007). The network design problem with relays, European Journal of Operational Research, 180 (2), 834 - 844.

Cabral, E. A., E. Erkut, G. Laporte, R. Patterson. (2007). Wide area telecommunication network design: application to the Alberta Supernet. Journal of the Operational Research Society 59, 1460 - 1470.

Burr, L.C., R.A. Patterson, E. Rolland, and K.F. Ward. (2007). Integration of e-CRM in Healthcare Services: A Framework for Analysis. International Journal of E-Business Research, Vol. 3, No. 2, April-June, pp. 1-12.

Channouf, N., A. Ingolfsson, P. L'Ecuyer, A. Avramidis. (2007). The application of forecasting techniques to modeling emergency medical system calls in Calgary, Alberta, Health Care Management Science, 10, 25 - 45.

Deslauriers, A., P. L'Ecuyer, J. Pichitlamken, A. Ingolfsson, and A. N. Avramidis. (2007). Markov Chain Models of a Telephone Call Center with Call Blending, Computers & Operations Research, 34 (6), 1616 - 1645.

Erkut, E., O. Alp. (2007). Designing a road network for hazardous materials shipments, Computers & Operations Research, forthcoming.

Erkut, E., O. Alp. (2007). Integrated routing and scheduling of hazmat trucks with stops en route, Transportation Science, 41 (1), 107 - 122.

Erkut, E., F. Gzara (2007). Solving the hazmat transport network design problem, Computers & Operations Research, forthcoming.

Ingolfsson, A., E. Akhmetshina, S. Budge, Y. Li and X. Wu (2007). A survey and experimental comparison of service-level approximation methods for nonstationary M(t)/M/s(t) queueing systems with exhaustive discipline, INFORMS Journal on Computing, 19 (2).


2006 Publications

Erkut, E., A. Karagiannidis, G. Perkoulidis, S.A. Tjandra. (2006) "A Multicriteria Facility Location Model for Municipal Solid Waste Management in North Greece," European Journal of Operational Research, forthcoming.

Erkut, E., S.A. Tjandra, V. Verter. (2006) "Hazardous Materials Transportation." Chapter 9 in C. Barnhart and G. Laporte, editors, Handbooks in Operations Research and Management Science: Transportation, 539 - 622, North-Holland.

Joro, T., P. Na. (2006) "Portfolio performance evaluation in a mean variance skewness framework," European Journal of Operational Research, 175 (1), 446 - 461.


2005 Publications

Castillo, I., Westerlund, T. (2005) An e-accurate model for optimal unequal-area facility layout design. Computers & Operations Research, 32 (3): 429-447.

Dasci, A. and G. Laporte (2005) A Continuous Model for Multi-Store Competitive Location. Operations Research 53 (2): 263-280

Dasci, A. and V. Verter (2005) Evaluation of Plant Focus Strategies: A Continuous Approximation Framework. Annals of Operations Research 136 (1): 303-327

Dasci, A. and G. Laporte (2005) An Analytical Approach to the Facility Location and Capacity Acquisition Problem under Demand Uncertainty. Journal of the Operational Research Society, 56 (4): 397-405.

Erkut, E., Ingolfsson, A. (2005) Transport risk models for hazardous materials: Revisited. Operations Research Letters, 33 (1): 81-89.


2004 Publications

Castillo, I., Peters, B.A. (2004) Integrating design and production planning considerations in multi-bay manufacturing facility layout. European Journal of Operational Research, 157 (3): 671-687.

Castillo, I., Sim, T. (2004) A spring-embedding approach for the facility layout problem. Journal of the Operational Research Society, 55 (1): 73-81.

Dasci, A. and G. Laporte (2004) Location and Pricing Decisions of a Multi-Store Monopoly in a Spatial Market, Journal of Regional Science, 44 (3): 489-515

Gordon, L., Erkut, E. (2004) Improving volunteer scheduling for the Edmonton Folk Festival. Interfaces, 34 (5): 367-376.

Hamacher, H.W., S. Ruzika, S.A. Tjandra. (2004) "Algorithms for Time-Dependent Bicriteria Shortest Path Problems," To appear in Discrete Applied Mathematics

Ingolfsson, A. (2004) Simulating NHL games to motivate student interest in OR/MS. INFORMS Transactions on Education, 5 (1).

Joro, T., and E.-J. Viitala (2004), "The Efficiency and Effectiveness of Public Forestry Organizations,"Journal of Operational Research Society, 55(8): 814-821.


2003 Publications

Alp, O., Z. Drezner, and E. Erkut (2003), "An Efficient Genetic Algorithm for the p-Median Problem," Annals of Operations Research, 122 (1-4), 21 - 42.

Alp, O., N. Erkip, and R. Gullu (2003), "Optimal Lot Sizing/Vehicle Dispatching Policies under Stochastic Lead Times and Stepwise Fixed Setup Costs," Operations Research, 51 (1), 160 - 166.

Alp, O., N. Erkip, and R. Gullu (2003), "Outsourcing Logistics: Design of Contracts Between a Manufacturer and a Transporter," Transportation Science, 37 (1), 23 - 39.

Bozkaya, B., E. Erkut, G. Laporte (2003), "A Tabu Search Heuristic and Adaptive Memory Procedure for Political Districting," European Journal of Operational Research, 144, 12-26.

Castillo, I. and B. A. Peters (2003), "An Extended Distance-Based Facility Layout Problem," International Journal of Production Research, 41 (11), 2451 - 2479.

Castillo, I., C. A. Roberts, and K. D. Peterman (2003), "Automatic Generation of Control Software Using Discrete Event Control Networks," International Journal of Industrial Engineering, 10 (3).

Daniel, T., A. Rapoport, and D. Seale (2003), "Asymmetric Two Person Bargaining under Incomplete Information: Strategic Play and Adaptive Learning," in Plott, C. R. and V. L. Smith (Eds.), Handbook of Experimental Economics Results.

Ingolfsson, A., E. Erkut and S. Budge (2003), "Simulation of Single Start Station for Edmonton EMS," Journal of the Operational Research Society, 54(7) 736-746.

Joro, T., P. Korhonen and S. Zionts (2003), "An Interactive Approach to Improve Estimates of Value Efficiency in Data Envelopment Analysis," European Journal of Operational Research, 149 (3), 688 - 699.

Jayaraman, V., R. A. Patterson and E. Rolland (2003), "The design of reverse distribution networks: Models and solution proc," European Journal of Operations Research, 150 (1), 128 - 149.

Litchfield, J., A. Ingolfsson, and J. Cheng (2003), "Rostering for Second Cup," INFOR, 41(3) 287-300.

Kara, B., E. Erkut, V. Verter (2003), "Accurate Calculation of Hazardous Materials Transport Risks," Operations Research Letters, 31 (4), 285 - 292.

Patterson, R. A. and E. Rolland (2003), "The Cardinality Constrained Covering Traveling Salesman Problem," Computers & Operations Research, 30, 97-116.

Riskin, M. D., K. C. Bessette, I. Castillo (2003) A Nonlinear Optimization Approach for Solving the Dashboard Planning Problem, INFOR, 41 (3), 245 - 257


2002 Publications

Castillo, I. and B. A. Peters (2002), "Unit Load and Material Handling Considerations in Facility Layout Design," International Journal of Production Research, 40, 2955-2989.

Castillo, I. and B. A. Peters (2002) "Concurrent Consideration of Layout Design and Product Flow Allocation in Multi-Bay Manufacturing Facilities," in Meller, R. D., M. Ogle, B. A. Peters, and J. S. Usher (Eds.), Progress in Material Handling Research, Material Handling Industry.

Castillo, I. and J. S. Smith (2002), "Formal Modeling Methodologies for Control of Manufacturing Cells: Survey and Comparison," Journal of Manufacturing Systems, 21, 40-57.

Dasci, A., H. A. Eiselt, and G. Laporte (2002), "On the (r|Xp)-Medianoid Problem on a Network with Vertex and Edge Demands," Annals of Operations Research, 111, 271-278.

Erkut, E. (2002), "Measuring Canadian Business School Research Output and Impact," Canadian Journal of Administrative Sciences, 19, 97-123.

Halme, M., T. Joro, and M. Koivu (2002), "Dealing with Interval Scale Data in Data Envelopment Analysis," European Journal of Operational Research 137, 22-27.

Ingolfsson, A. and T. Grossman (2002), "Graphical Spreadsheet Simulation of Queues," INFORMS Transactions on Education, Vol. 2, No. 2.

Joro, T. and P. Na (2002), "Credit Risk Modeling for Catastrophic Events," in Ycesan, E., C.-H. Chen, J. L. Snowdon, and J. M. Charnes (Eds.), Proceedings of the 2002 Winter Simulation Conference, 1511-1514.

Patterson, R. A., and E. Rolland (2002), "A Decision Model For Configuration Of Firm Boundaries In The Network Economy," The Electronic Journal for E-Commerce Tools & Applications, 1. 

Patterson, R. A. and E. Rolland (2002), "Hybrid Fiber Co-Axial Network Design," Operations Research, 50.

Verter, V. and A. Dasci (2002), "The Plant Location and Flexible Technology Acquisition Problem," European Journal of Operational Research, 136, 366-382.


2001 Publications

Bozkaya, B., J. Zhang, and E. Erkut (2001), "An Efficient Genetic Algorithm for the p-Median Problem," in Hamacher, H. and Z. Drezner (Eds.), Location Theory, Springer-Verlag.

Castillo, I., S. A. Reyes, and B. A. Peters (2001), "Modeling and Analysis of Tandem AGV Systems Using Generalized Stochastic Petri Nets," Journal of Manufacturing Systems, 20, 236-249.

Castillo, I. and C. A. Roberts (2001), "Real-Time Control/Scheduling for Multi-purpose Batch Plants," Computers & Industrial Engineering, 41, 211-225.

Daniel, T., A. Rapoport, and D. Seale (2001), "The Information Advantage in Two Person Bargaining with Incomplete Information," Journal of Economics, Behavior and Organizations, 44, 177-200.

Dasci, A. and V. Verter (2001), "A Continuous Model for Production-Distribution System Design Problem," European Journal of Operational Research,129, 287-298.

Dasci, A. and V. Verter (2001), "The Plant Location and Technology Acquisition Problem," IIE Transactions, 33, 963-973.

Erkut, E., R. Fenske, S. Kabanuk, Q. Gardiner, and J. Davis (2001), "Improving the Emergency Service Delivery in St. Albert," INFOR, 30, 416-433.

Ingolfsson, A., M. A. Haque, and A. Umnikov (2001), "Accounting for Time-Varying Queueing Effects in Tour Scheduling," European Journal of Operational Research, 139, 585-597.

Lardies, A., R. Gupta and R. A. Patterson (2001), "Traffic grooming in a multi-layer network," Optical Network Magazine, May/June 2001, 91-99.

Verter, V., A. Dasci, and A. A. Bulgak (2001), "The Production-Distribution System Design Problem," in Floudas, C. and P. Pardalos (Eds.), Encyclopedia of Optimization, Vol. IV, Kluwer, 383-392.


2000 Publications

Akgun, V., E. Erkut, and R. Batta (2000), "On Finding Dissimilar Paths," European Journal of Operational Research, 121, 232-246.

Daniel, T., A. Plourde, R. Hyndman, and M. Loenen (2000), "Electricity Deregulation in Alberta: A Risky Proposition," Gestion, 25, 60-66.

Erkut, E. and A. Ingolfsson (2000), "Catastrophe Avoidance Models for Hazardous Materials Route Planning," Transportation Science, 34, 165-179.

Erkut, E. and A. Ingolfsson (2000), "Let's Put the Squares in Least-Squares," INFORMS Transactions on Education, Vol. 1, No. 1.

Erkut, E., T. Myroon, and K. Strangway (2000), "TransAlta Redesigns Its Service Delivery Network," Interfaces, 30, 54-69.

Joro, T. (2000), "Target Mix Approach for Measuring Efficiency in Data Envelopment Analysis," in Haimes, Y. and R. Steuer (Eds.), Research and Practice in Multiple Criteria Decision Making, Lecture Notes in Economics and Mathematical Systems, Vol. 487, Springer-Verlag, 308-318.

Patterson, R. A. and H. Pirkul (2000), "Heuristic Procedure Neural Networks for the CMST Problem," Computers and Operations Research, 27, 1171-1200.

Zhang, J., E. Erkut, and J. Hodgson (2000), "Using GIS to Assess the Risks of Hazardous Materials Transport on Networks," European Journal of Operational Research, 121, 316-329.


1999 Publications

E. Erkut and B. Bozkaya (1999), "Analysis of Aggregation Errors for the p-Median Problem," Computers & Operations Research, 26, 1075-1096.

Halme, M., T. Joro, P. Korhonen, S. Salo, and J. Wallenius (1999), "A Value Efficiency Approach to Incorporating Preference Information in Data Envelopment Analysis," Management Science, 45, 103-115.

Ingolfsson, A. and D. Zalkind (1999), "The Teachers' Forum: Two Looks at the Spinner Experiment," Interfaces, 29, 112-126.

Patterson, R. A., E. Rolland and H. Pirkul (1999), "A Memory Adaptive Reasoning Technique for Solving the Capacitated Minimum Spanning Tree Problem," Journal of Heuristics, 5, 159-180.

Rolland, E., R. A. Patterson, and H. Pirkul (1999), "Memory Adaptive Reasoning and Greedy Assignment Techniques for the Capacitated Minimum Spanning Tree Problem," in Voss, S., S. Martello, I. Osman, C. Roucairol (Eds.), Meta-Heuristics: Advances and Trends in Local Search Paradigms for Optimization, Kluwer, 487-498.


1998 Publications

Daniel, T., D. Seale, and A. Rapoport (1998), "Strategic Play and Adaptive Learning in the Sealed Bid Bargaining Mechanism," Journal of Mathematical Psychology, 42, 133-166.

Daniel, T., D. Seale, and A. Rapoport (1998), "Reinforcement-Based Adaptive Learning in Asymmetric Two-Person Bargaining with Incomplete Information," Journal of Experimental Economics, 1, 221-253.

Erkut, E. and V. Verter (1998), "Modeling of Transport Risk for Hazardous Materials,"Operations Research, 46, 625-642.

Joro, T., P. Korhonen, and J. Wallenius (1998), "Structural Comparison of Data Envelopment Analysis and Multiple Objective Linear Programming," Management Science, 44, 962-970.

Kumar, A., W. M. Muhanna, and R.A. Patterson (1998), "Mean-Variance Analysis of the Performance of Spatial Clustering Methods," International Journal of Geographical Information Science, 12, 269-289.