Alejandro Toriello

Associate Professor
Leo and Louise Benatar Early Career Development Professor
H. Milton Stewart School of Industrial and Systems Engineering
Georgia Institute of Technology
765 Ferst Drive NW
Atlanta, GA 30332

Office: Groseclose 427
atoriello at isye dot gatech dot edu

About me

I am an associate professor in Industrial Engineering at Georgia Tech. I am generally interested in supply chain management and logistics, particularly in transportation and inventory topics. I am also broadly interested in mathematical optimization, especially discrete and dynamic models.

My CV. (Last updated June 4, 2020.)

Google Scholar profile.

LinkedIn profile.


Working Papers and Pre-Prints

  1. R. Khir*, A. Erera, A. Toriello. Two-Stage Sort Planning for Express Parcel Delivery.

  2. C. Muir*, A. Toriello. Dynamic Node Packing.

  3. J. Li*, A. Toriello, H. Wang, S. Borin, C. Gallarno. Dynamic Inventory Allocation in Dillard's Fashion Retail Network.

  4. M. Klapp*, A. Erera, A. Toriello. Order Acceptance in Same-Day Delivery.

  5. A. Stroh*, A. Erera, A. Toriello. Tactical Design of Same-Day Delivery Systems.

  6. S. Perez-Salazar*, I. Menache, M. Singh, A. Toriello. Dynamic Resource Allocation in the Cloud with Near-Optimal Efficiency.

    Runner-Up, INFORMS Computing Society Student Paper Award, 2019.

  7. W. Zhang, N.A. Uhan, M. Dessouky, A. Toriello. Acyclic Mechanism Design for Freight Consolidation.

  8. F. Lagos*, M. Klapp*, A. Toriello. Branch-and-Price for Routing with Probabilistic Customers.

  9. S. Güven-Koçak*, A. Heching, P. Keskinocak, A. Toriello. Home Health Care Routing and Scheduling with Consistency in Patient-Aide Assignments.

  10. A. Torrico*, A. Toriello. Dynamic Relaxations for Online Bipartite Matching.

  11. R. Fukasawa, A. Sapucaia Barboza, A. Toriello. On the Strength of Approximate Linear Programming Relaxations for the Traveling Salesman Problem.

    An earlier proof of Theorem 3 appeared in the working paper Equivalence of an Approximate Linear Programming Bound with the Held-Karp Bound for the Traveling Salesman Problem.

Published or Accepted

  1. D. Blado*, A. Toriello. A Column and Constraint Generation Algorithm for the Dynamic Knapsack Problem with Stochastic Item Sizes. Mathematical Programming Computation. Forthcoming, 2020.

  2. W. Hu*, Z. Yu*, A. Toriello, M. Dessouky. Decomposition-Based Approximation Algorithms for the One-Warehouse Multi-Retailer Problem with Concave Batch Order Costs. Naval Research Logistics. Forthcoming, 2020.

  3. D. Blado*, A. Toriello. Relaxation Analysis for the Dynamic Knapsack Problem with Stochastic Item Sizes. SIAM Journal on Optimization. 29:1-30, 2019.

  4. W. Zhang, N.A. Uhan, M. Dessouky, A. Toriello. Moulin Mechanism Design for Freight Consolidation. Transportation Research Part B: Methodological. 116:141-162, 2018.

  5. W.B. Haskell, A. Toriello. Modeling Stochastic Dominance as Infinite-Dimensional Constraint Systems via Strassen's Theorem. Journal of Optimization Theory and Applications. 178:726-742, 2018.

  6. M. Klapp*, A.L. Erera, A. Toriello. The Dynamic Dispatch Waves Problem for Same-Day Delivery. European Journal of Operational Research. 271:519-534, 2018.

  7. W. Hu*, A. Toriello, M. Dessouky. Integrated Inventory Routing and Freight Consolidation for Perishable Goods. European Journal of Operational Research. 271:548-560, 2018.

  8. A. Torrico*, S. Ahmed, A. Toriello. A Polyhedral Approach to Online Bipartite Matching. Mathematical Programming. 172:443-465, 2018.

    Conference version in Proceedings of the 18th Conference on Integer Programming and Combinatorial Optimization, IPCO 2016. Springer, 287-299, 2016.

  9. D. Reyes*, M. Savelsbergh, A. Toriello. Vehicle Routing with Roaming Delivery Locations. Transportation Research Part C: Emerging Technologies. 80:71-91, 2017.

  10. A. Toriello, N.A. Uhan. Dynamic Linear Programming Games with Risk-Averse Players. Mathematical Programming. 163:25-56, 2017.

  11. D. Blado*, W. Hu*, A. Toriello. Semi-Infinite Relaxations for the Dynamic Knapsack Problem with Stochastic Item Sizes. SIAM Journal on Optimization. 26:1625-1648, 2016.

  12. W. Hu*, M.S. Lavieri, A. Toriello, X. Liu. Strategic Health Workforce Planning. IIE Transactions. 48:1127-1138, 2016.

    Honorable Mention, INFORMS SPPSN Best Paper Award, 2013.

  13. J. Woodruff, W.B. Haskell, A. Toriello. Optimized Financial Systems Helps Customers Meet their Personal Finance Goals with Optimization. Interfaces. 46:345-359, 2016.

  14. G.J. Schell, M.S. Lavieri, F. Jankovic, X. Li, A. Toriello, K.K. Martyn, G.L. Freed. Strategic Modeling of the Neonatal Nurse Practitioner Workforce. Nursing Outlook. 64:385-394, 2016.

  15. M. Klapp*, A.L. Erera, A.Toriello. The One-Dimensional Dynamic Dispatch Waves Problem. Transportation Science. 52:402-415, 2018.

  16. L. Rademacher, A. Toriello, J.P. Vielma. On Packing and Covering Polyhedra in Infinite Dimensions. Operations Research Letters. 44:225-230, 2016.

  17. G.J. Schell, X. Li, M.S. Lavieri, A. Toriello, K.K. Martyn, G.L. Freed. Strategic Modeling of the Pediatric Nurse Practitioner Workforce: How Policy Changes Can Yield Self-Sufficiency. Pediatrics. 135:298-306, 2015.

  18. A. Toriello, W.B. Haskell, M. Poremba*. A Dynamic Traveling Salesman Problem with Stochastic Arc Costs. Operations Research. 62:1107-1125, 2014.

  19. C. Nguyen*, M. Dessouky, A. Toriello. Consolidation Strategies for the Delivery of Perishable Products. Transportation Research Part E: Logistics and Transportation Review. 69:108-121, 2014.

  20. A. Toriello. Optimal Toll Design: A Lower Bound Framework for the Asymmetric Traveling Salesman Problem. Mathematical Programming. 144:247-264, 2014.

  21. A. Toriello, N.A. Uhan. Dynamic Cost Allocation for Economic Lot Sizing Games. Operations Research Letters. 42:82-84, 2014.

  22. A. Toriello, N.A. Uhan. On Traveling Salesman Games with Asymmetric Costs. Operations Research, 61:1429-1434, 2013. (Technical note.)

  23. C. Nguyen*, A. Toriello, M. Dessouky, J. Moore. Evaluation of Transportation Practices in the California Cut Flower Industry. Interfaces. 43:182-193, 2013.

  24. D. Papageorgiou, A. Toriello, G. Nemhauser, M. Savelsbergh. Fixed-Charge Transportation with Product Blending. Transportation Science. 46:281-295, 2012.

  25. A. Toriello, J.P. Vielma. Fitting a Continuous Piecewise Linear Function. European Journal of Operational Research. 219:86-95, 2012.

  26. A. Toriello, G. Nemhauser. The Value Function of an Infinite-Horizon Single-Item Lot-Sizing Problem. Operations Research Letters. 40:12-14, 2012.

  27. A. Toriello, G. Nemhauser, M. Savelsbergh. Decomposing Inventory Routing Problems with Approximate Value Functions. Naval Research Logistics. 57:718-727, 2010.

  28. F. Kılınç-Karzan, A. Toriello, S. Ahmed, G. Nemhauser, M. Savelsbergh. Approximating the Stability Region for Binary Mixed-Integer Programs. Operations Research Letters. 37:250-254, 2009.


  1. A. Toriello. Time Decomposition of Multi-Period Supply Chain Models. Ph.D. Thesis. Georgia Institute of Technology, December 2010.

  2. A. Toriello. A Brief Lecture on Submodular Functions.

* Indicates supervised student co-author.

Recent and Upcoming Presentations

Other Activities