Dietmar Moeller

A Simulation Approach to Evaluating Productivity Improvement at a Seaport Coal Terminal

The use of simulation in evaluating the impact of productivity improvement activities at the McDuffie Coal Terminal located at the Alabama State Docks in Mobile, Alabama, is discussed. Simulations are being employed for port and terminal operations at an increasing rate because of the value derived as decision support tools. A description of the productivity improvement events, the conceptual framework of the simulation model, and an analysis of the simulation results are presented.

Analyzing the diverging diamond interchange using discrete event simulation

The diverging diamond interchange (DDI) can improve traffic flow by limiting the number of phases in the traffic signals and improve safety by eliminating left turns. A few instillations of these interchanges have been constructed and there is great potential to construct more. In an effort to develop a methodology to evaluate these interchanges, this paper presents the development of a discrete event simulation model of the diverging diamond interchange (DDI). Specific emphasis is on using simulation to model the DDI, a description of the operation of the simulation model, and using simulation to understand the operation of the DDI. The paper concludes that the use of the simulation package allows for rapid evaluation of the DDI and demonstrates that this interchange design will not work in all locations.

Resources to Minimize Disruption Caused by Increased Security Inspection of Containers at an Intermodal Terminal Application of Simulation

This paper presents the application of simulation to determine the inspection resources needed to minimize disruption resulting from increased security inspection of containers at an intermodal terminal. The initial simulation run intentionally started with a large number of resources. Additional simulation runs were made with a continual reduction of inspection resources until entity throughput at the terminal dropped below allowable limits. Simulation Run 9, with six tailgate inspection stations, three intensive inspection stations, and one general purpose inspector, provided the minimum resources that did not disrupt container throughput. This paper includes the description of the conceptual model framework, the simulation model, the experimental design, and simulation results.