Thaddeus Sim

Socially optimal location of facilities with fixed servers, stochastic demand and congestion

  • Ignacio Castillo
  • Armann Ingolfsson
  • Thaddeus Sim
    • Categories (Mixed) Integer Nonlinear Programming, Multidisciplinary Design Optimization

    We present two capacity choice scenarios for the socially optimal location of facilities with fixed servers, stochastic demand and congestion. Walk-in health clinics, motor vehicle inspection stations, automobile emissions testing stations, and internal service systems are motivating examples of such facilities. The choice of locations for such facilities influences not only distances for users traveling … Read more

    A spring-embedding approach for the facility layout problem

  • Ignacio Castillo
  • Thaddeus Sim
    • Categories Convex Optimization, Facility Planning and Design

    The facility layout problem is concerned with finding the most efficient arrangement of a given number of departments with unequal area requirements within a facility. The facility layout problem is a hard problem, and therefore, exact solution methods are only feasible for small or greatly restricted problems. In this paper, we propose a spring-embedding approach … Read more