Industrial case-study on the dynamics and sensitivity of a close-coupled production-distribution system†

Abstract

This paper describes techniques used to model a live close-coupled production-distribution system. The model's purpose was to study dynamic behaviour and thus appraise current system performance. It concerns a specific case study undertaken within the time-scales typical of industrial projects. A conceptual understanding of the production-distribution system was gained using Input-Output analysis and the study of time-series data. This work was then used as a base for a continuous computer simulation model using the DYNAMO language. The steps taken to build this model are outlined along with any compromises needed to describe specific details. This is followed by a discussion of the observed behaviour characteristics that were verified by the model including the amplification of the demand pattern as orders passed from the retail outlets, through the distributor, and finally onto the factory shopfloor. The description concludes by considering the results of a sensitivity analysis on the model and the recommendations for improved system design. There is found to be an emerging need for a theoretical understanding of the dynamic characteristics of basic structures recurring in manufacturing system designs from which similar studies could benefit

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