Publications

Published or To Appear in Peer-Reviewed Journals

  1. Marlin Ulmer and Barrett W. Thomas.  “Meso-Parametric Value Function Approximation for Dynamic Customer Acceptances in Delivery Routing.” European Journal of Operational Research, to appear. 
  2. Marlin W. Ulmer, Barrett W. Thomas, and Dirk C. Mattfeld.  “Preemptive Depot Returns for a Dynamic Same-Day Delivery Problem.”  EURO Journal on Transportation and Logistics, to appear.
  3. Marlin W. Ulmer and Barrett W. Thomas.  “Enough Waiting for the Cable Guy – Estimating Arrival Times for Service Vehicle Routing.” Transportation Science, 2019:53(3), 897 – 916.
  4. Huan Jin and Barrett W. Thomas.  “Team Orienteering with Uncertain Rewards and Service Times with an Application to Phlebotomist Intra-Hospital Routing.”  Networks, 2019:73(4), 453 – 465.
  5. Stacy Voccia, Ann M. Campbell, and Barrett W. Thomas.  “Same-Day Delivery Problem for Online Purchases.”  Transportation Science, 2019:53(1), 167 – 184. 
  6. Barrett W. Thomas, Tobia Calogiuri, and Mike Hewitt.  “An Exact Bidirectional A* Approach for Solving Resource-Constrained Shortest Path Problems.”  Networks, 2019:73(2), 187- 205. 
  7. Shu Zhang, Jeffrey W. Ohlmann, and Barrett W. Thomas.  “Dynamic Orienteering on a Network of Queues.” Transportation Science, 2018:52(3), 691 – 706.
  8. Huan Jin, Barrett W. Thomas, and Mike Hewitt. “Workforce Grouping and Assignment with Learning-by-doing and Knowledge Transfer.” International Journal of Production Research, 2018:56(4), 4968 – 4982
  9. Marlin Ulmer and Barrett W. Thomas. “Same-Day Delivery with a Heterogeneous Fleet of Drones and Vehicles.” Networks, 2018:72(4), 475 – 505.
  10. Jan F. Ehmke, Ann Campbell, and Barrett W. Thomas. “Optimizing for Total Costs in Vehicle Routing in Urban Areas.” Transportation Research Part E: Logistics and Transportation Review, 2018:116, 242-265.
  11. Xi Chen, Mike Hewitt, and Barrett W. Thomas. “An Approximate Dynamic Programming Method for the Multi-Period Technician Scheduling Problem with Experience-based Service Times and Stochastic Customers.” International Journal of Production Economics, 2018:196, 122 – 134.
  12. Silviya Valeva, Barrett W. Thomas, and Mike Hewitt.  “A Matheuristic for Workforce Planning with Employee Learning and Stochastic Demand.” International Journal of Production Research, 2017: 55(24), 7380 – 7397.
  13. Kamal Lamsal, Philip C. Jones, and Barrett W. Thomas.  “Sugarcane Harvest Logistics in Brazil.” Transportation Science, 2017:51(2), 771 – 789. 
  14. Xi Chen, Barrett W. Thomas, and Mike Hewitt.  “Multi-Period Technician Scheduling with Experience-based Service Times and Stochastic Customers.” Computers & Operations Research, 2017: 82, 1 – 14. 
  15. Silviya Valeva, Mike Hewitt, Barrett W. Thomas, and Kenneth G. Brown.  “Balancing Flexibility and Inventory in Workforce Planning with Learning.” International Journal of Production Economics, 2017:183A, 194 – 207.
  16. Justin C. Goodson, Barrett W. Thomas, and Jeffrey W. Ohlmann.  “A Rollout Algorithm Framework for Heuristic Solutions to Finite-Horizon Stochastic Dynamic Programs.”  European Journal of Operational Research, 2017:258(1), 216 – 229.
  17. Huan Jin, Barrett W. Thomas, and Mike Hewitt.  “Integer Programming Techniques for Makespan Models that Recognize Human Learning.”  Computers and Industrial Engineering, 2016:97, 202 – 211.
  18. Justin C. Goodson, Barrett W. Thomas, and Jeffrey W. Ohlmann.  “Restocking-Based Rollout Policies for the Vehicle Routing Problem with Stochastic Demand and Duration.”  Transportation Science, 2016:50(2), 591 – 607.
  19. Xi Chen, Barrett W. Thomas, and Mike Hewitt.  “Technician Routing with Experience-based Service Times.”  Omega, 2016:61, 49 – 61.
  20. Jan F. Ehmke, Ann Campbell, and Barrett W. Thomas.  “Vehicle Routing to Minimize Time-Dependent Expected Emissions in Urban Areas.”  European Journal of Operational Research, 2016:251(2), 478 – 494.
  21. Jan F. Ehmke, Ann Campbell, and Barrett W. Thomas.  “Data-Driven Approaches for Emissions-Minimized Paths in Urban Areas.”  Computers & Operations Research, 2016:67, 34 – 47.
  22. Kamal Lamsal, Philip C. Jones, and Barrett W. Thomas.  “Continuous Time Scheduling for Sugarcane Harvest Logistics in Louisiana.” International Journal of Production Research, 2016:54(2), 616 – 627.
  23. Kamal Lamsal, Philip C. Jones, and Barrett W. Thomas.  “Harvest Logistics in Agricultural Systems with Multiple, Independent Producers and No On-Farm Storage.” Computers and Industrial Engineering, 2016:91, 129 – 138.
  24. Mike Hewitt, Austin Chacosky, Scott E. Grasman, and Barrett W. Thomas.  “Integer Programming Techniques for Solving Non-linear Programs with an Application to Workforce Planning Models with Learning.”  European Journal of Operational Research, 2015:242(3), 942 – 950.
  25. Shu Zhang, Jeffrey W. Ohlmann, and Barrett W. Thomas.  “A Priori Orienteering with Time Windows and Stochastic Wait Times at Customers.”  European Journal of Operational Research, 2014:239(1), 70 – 79.
  26. Barrett W. Thomas and Emanuele Manni.  “Scheduled Penalty Variable Neighborhood Search.”  Computers & Operations Research, 2014:52(Part B), 170 – 180. 
  27. Justin C. Goodson, Jeffrey W. Ohlmann, and Barrett W. Thomas.  “Rollout Policies for Dynamic Solutions to the Multi-Vehicle Routing Problem with Stochastic Demand and Duration Limits.” Operations Research, 2013:61(1), 138 – 154.
  28. Manuel López-Ibáñez, Christian Blum, Jeffrey W. Ohlmann, and Barrett W. Thomas.  “The Traveling Salesman Problem with Time Windows: Adapting Algorithms from Travel-time to Makespan Optimization.”  Applied Soft Computing, 2013:12(9), 3806–3815.
  29. Scott E. Grasman and Barrett W. Thomas.  “Scrambled Experts: Team Handicaps and Win Probabilities for Golf Scrambles.”  Journal of the Quantitative Analysis of Sports, 2013:9(3), 217–227. 
  30. Stacy Voccia, Ann M. Campbell, and Barrett W. Thomas.  “Probabilistic Traveling Salesman Problem with Time Windows.”  EURO Journal on Transportation and Logistics, 2013:2(1), 89-107. 
  31. Hui Chen, Ann M. Campbell, and Barrett W. Thomas.  “Network Design for Time-Constrained Delivery Using Subgraphs.” Computational Management Science, 2012:9(4), 531 – 542.
  32. Gianpaolo Ghiani, Emanuele Manni, and Barrett W. Thomas.  “A Comparison of Anticipatory Algorithms for the Dynamic and Stochastic Traveling Salesman Problem.”  Transportation Science, 2012:46(3), 374 – 387.
  33. Justin C. Goodson, Jeffrey W. Ohlmann, and Barrett W. Thomas.  “Cyclic-Order Neighborhoods for Vehicle Routing Problems.” European Journal of Operational Research, 2012:217, 312 – 323.
  34. Ann M. Campbell, Michel Gendreau, and Barrett W. Thomas.  “The Orienteering Problem with Stochastic Travel and Service Times Times.” Annals of Operations Research, 2011:186(1), 61 – 81.
  35. Hui Chen, Ann M. Campbell, Arie Tamir, and Barrett W. Thomas.  “Minimax Flow Tree Problems.”  Networks, 2009:54(3), 117 – 129. 
  36. Thaddeus Sim, Timothy Lowe, and Barrett W. Thomas.  “The Stochastic p-Hub Center Problem with Service-Level Constraints.” Computers & Operations Research, 2009:36(12), 3166 – 3177.
  37. Ann M. Campbell and Barrett W. Thomas.  “Runtime Reduction Techniques for the Probabilistic Traveling Salesman Problem with Deadlines.” Computers & Operations Research, 2009:36, 1231 – 1248.
  38. Hui Chen, Ann M. Campbell, and Barrett W. Thomas.  “Network Design for Time-Constrained Delivery.” Naval Research Logistics, 2008:55(6), 493 – 515.
  39. Jeffrey W. Ohlmann, Michael J. Fry, and Barrett W. Thomas.  “Route Design for Lean Production Systems.” Transportation Science, 2008:42(3), 352 – 370.
  40. Ann M. Campbell and Barrett W. Thomas.  “Probabilistic Traveling Salesman Problem with Deadlines.” Transportation Science, 2008:42(1), 1–21.
  41. Barrett W. Thomas.  “Waiting Strategies for Anticipating Service Requests at Known Customer Locations.” Transportation Science, 2007:41(3), 319-331.
  42. Jeffrey W. Ohlmann and Barrett W. Thomas.  “A Compressed-Annealing Heuristic for the Traveling Salesman Problem with Time Windows.”  INFORMS Journal on Computing, 2007:19(1), 80-90.
  43. Barrett W. Thomas and Chelsea C. White III.  “The Dynamic Shortest Path Problem with Anticipation.” European Journal of Operational Research, 2007:176(2), 836-854.
  44. Barrett W. Thomas and Chelsea C. White III.  “Anticipatory Route Selection.” Transportation Science, 2004:38(4), 473 – 487.

Submitted for Publication

  1. Yongjia Song, Marlin Ulmer, Barrett W. Thomas, and Stein Wallace.  “Building Trust in Home Services – Stochastic Team-Orienteering with Consistency Constraints.” Revised and resubmitted, April 2019. 
  2. Marlin Ulmer, Justin C. Goodson, Dirk C. Mattfeld, and Barrett W. Thomas.  “Route-based Markov Decision Processes for Dynamic Vehicle Routing Problems.” Revised and resubmitted, March 2019. 
  3. Marlin Ulmer, Barrett W. Thomas, Ann M. Campbell, and Nicolas Woyak. “The Restaurant Meal Delivery Problem: Dynamic Pick-Up and Delivery with Deadlines and Random Ready Times.” Revised and resubmitted, December 2018. 
  4. Fahrettin Cakir, W. Nick Street, and Barrett W. Thomas.  “Revisiting Cluster First, Route Second for the Vehicle Routing Problem.” Revised and resubmitted, June 2018. 

In Revision

  1. Shu Zhang, Jeffrey W. Ohlmann, and Barrett W. Thomas. “Multi-Period Orienteering with Uncertain Adoption Likelihood and Waiting at Customers.” March 2019.
  2. Silviya Valeva, Mike Hewitt, and Barrett W. Thomas.  “Managing Uncertainty in Demand through Inventory and Workforce Development.” October 2017. 

Working Papers
Shu Zhang, Emanuele Manni, and Barrett W. Thomas.  “A Scheduled Penalty Variable Neighborhood Search for the Team Orienteering Problem with Time Windows.” March 2019.

Peer-Reviewed Book Chapters
Barrett W. Thomas. “Dynamic Vehicle Routing.” Wiley Encyclopedia of Operations Research and Management Science.  Edited by James J. Cochran.  Wiley, 2010.

Ann M. Campbell and Barrett W. Thomas.  “Challenges and Advances in A Priori Routing.” The Vehicle Routing Problem: Latest Advances and Challenges.  Edited by Bruce Golden, Raghu Raghavan, and Edward Wasil.  Volume 43 of Operations Research/Computer Science Interfaces, Springer, 2008.

Other Articles and Book Chapters
Mike Hewitt and Barrett W. Thomas. “Special Issue on Uncertainty in Logistics and Transportation Systems.” Transportation Science, 2018:52(1), 1 – 2.

Barrett W. Thomas, Mike Hewitt, and Scott E. Grasman.  “An Operations Management Perspective on Employee Training and Workforce Planning.”  The Cambridge Handbook of Workplace Training and Employee Development. Edited by Kenneth G. Brown, Cambridge University Press, 2018. 

Philip C. Jones and Barrett W. Thomas.  “Lean in Healthcare.”  Handbook of Healthcare Delivery Systems.  Edited by Yuehwern Yih.  Industrial and Systems Engineering Series, CRC Press, 2010.