Research

My primary research interests include healthcare operations management, supply chain risk management, and applied scheduling problems. 

Accepted Journal Publications

  • Keskin, B.B., Freeman, N.K., and McCullough, C. IJAA: Past, Present, and Future. Forthcoming in INFORMS Journal on Applied Analytics.
  • Freeman, N.K., Zhao, M, Melouk, S.H., and Mittenthal, J. (2019). The Economics of Overlapping Surgery. Production & Operations Management (POMS), 28(10): 2629-2652.
  • Freeman, N.K., Narayanan, A., and Burns, G.P. A Decision Support System for Empty Hopper Car Management. INFORMS Journal on Applied Analytics (formerly Interfaces), 49(1): 173-188. 
  • Zhao, M. and Freeman, N.K. (2019). Robust Sourcing from Suppliers under Ambiguously Correlated Major Disruption Risks. Production & Operations Management (POMS), 28(2): 441-456.
  • Freeman, N.K., Keskin, B.B., and Capar, I. (2018). Attractive Orienteering Problem with Proximity and Timing Interactions. European Journal of Operational Research (EJOR), 266(1), 354-370.
  • Freeman, N.K., Mittenthal, J., Melouk, S.H., and Keskin, B.B. (2018). Sourcing Strategies for a Capacitated Firm Subject to Supply and Demand Uncertainty. Omega, 77: 127-142.
  • Freeman, N.K., Zhao, M., and Melouk, S.H. (2018). An Iterative Approach for Case Mix Planning Under Uncertainty. Omega, 76: 160-173.
  • Freeman, N.K., Melouk, S.H., and Mittenthal, J. (2016). A Scenario-Based Approach for Operating Theater Scheduling under Uncertainty. Manufacturing & Service Operations Management (MSOM), 18(2): 245-261.
  • Keskin, B.B., Capar, I., Sox, C., and Freeman, N.K. (2014). An Integrated Load Planning Algorithm for Outbound Logistics at Webb Wheel. INFORMS Journal on Applied Analytics (formerly Interfaces), 44(5): 480-497.
  • Freeman, N.K., Mittenthal, J., and Melouk, S.H. (2014). Parallel Machine Scheduling to Minimize Overtime and Waste Costs. IISE Transactions (formerly IIE Transactions), 46(6): 601-618.
  • Melouk, S.H., Freeman, N.K., Miller, D., and Dunning, M. (2013). Simulation Optimization-Based Decision Support Tool for Steel Manufacturing. International Journal of Production Economics, 141(1): 269-276.

Papers Under Review

  • Freeman, N.K., Narayanan, A., and Keskin, B.B. Optimal Use of Downward Substitution in a Manufacturing Operation Subject to Uncertainty. Under second round of review at Omega.
  • Freeman, N.K. and Narayanan, A. The Impact of Multiple Products and Limited Capacity on Routine Sourcing Decisions. In preparation for resubmission to the International Journal of Production Research (IJPR) (received a Major Revision decision on initial submission).
  • Zhao, M., Freeman, N.K., and Pan, K. Distributionally Robust Sourcing. Under review at Production & Operations Management (POMS).