P. Rogers

Publications (2)0 Total impact

• Source

  Available from: informs-sim.org

  Conference Proceeding: Dynamic adjustment of replenishment parameters using optimum-seeking simulation

  C.S. Grewal, S.T. Enns, P. Rogers
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  ABSTRACT: This paper addresses the use of discrete-event simulation and heuristic optimization to dynamically adjust the parameters within a continuous-review reorder point replenishment strategy. This dynamic adjustment helps to manage inventory and service levels in a simple supply chain environment with seasonal demand. A discrete-event simulation model of a capacitated supply chain is developed and a procedure to dynamically adjust the replenishment parameters based on re-optimization during different parts of the seasonal demand cycle is explained. The simulation logic and optimization procedure are described. Further, analysis of the impact on inventory is performed.
  Simulation Conference (WSC), Proceedings of the 2010 Winter; 01/2011
• Conference Proceeding: Performance effects of setup time reduction with and without decision variable re-optimization: A simulation-optimization study

  C.S. Grewal, S.T. Enns, P. Rogers
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  ABSTRACT: This study investigates the benefits of setup time reduction in a simple, capacity-constrained supply chain using reorder point replenishment. A discrete-event simulation model was developed and linked to an optimization engine for simulation-optimization experiments. Performance trade-off curves between total inventory and customer service levels were generated under different setup times. Comparisons were made with and without re-optimizing the reorder point and lot size decision variables after reducing setups. It was found that the benefits of setup reduction can be amplified with re-optimizing. Analysis of variance (ANOVA) was used to analyze the main and interaction effects. The behavior of the optimal decision variables under setup time reduction was also examined. Insights should provide guidance for industrial practitioners wishing to maximize the benefits of setup time reduction.
  Simulation Conference (WSC), Proceedings of the 2009 Winter; 01/2010