Erfan Mehmanchi

Analysis of Process Flexibility Designs under Disruptions

  • Hoda Bidkhori
  • Oleg A. Prokopyev
  • Erfan Mehmanchi
    • Categories Production and Logistics, Robust Optimization, Supply Chain Management Tags , , , ,

    Most of the previous studies of process flexibility designs have focused on expected sales and demand uncertainty. In this paper, we examine the worst-case performance of flexibility designs in the case of demand and supply uncertainties, where the latter can be in the form of either plant or arc disruptions. We define the Plant Cover … Read more

    On robust fractional 0-1 programming

  • Colin Gillen
  • Andrés Gómez
  • Oleg A. Prokopyev
  • Erfan Mehmanchi
    • Categories (Mixed) Integer Linear Programming, (Mixed) Integer Nonlinear Programming, Robust Optimization Tags , ,

    We study single- and multiple-ratio robust fractional 0-1 programming problems (RFPs). In particular, this work considers RFPs under a wide-range of disjoint and joint uncertainty sets, where the former implies separate uncertainty sets for each numerator and denominator, and the latter accounts for different forms of inter-relatedness between them. First, we demonstrate that, unlike the … Read more