MODELING, ANALYSIS SIMULATION OF TUBES MANUFACTURING PROCESSAND INDUSTRIAL OPERATIONS CONTROLS

摘要

In a generic manufacturing system the marketrnorders concerning products or items are translated intornShop Orders (often referred also as Jobs, parts, Ordersrnand so on). Each Shop Order (here in after S.O.),rnfollowing a precise job routing, is subjected to arnparticular sequences of operations in order to berncompleted. The operations are in general executed byrnmeans of machines, workstations, etc.rnWhen a market demand becomes S.O. it meansrnthat, in a short period of time, it will be manufacturedrnthe relative product in order to satisfy customerrnrequirements. For each S.O. the problem is therndetermination of the start time and completion time inrncorrespondence of each machine or workstation. Inrnother words, in a certain period of time (days, weekrnetc.) it is required to schedule the available S.O.s on thernavailable machines avoiding unfeasible scheduling andrnoptimizing some functions to improve systemrnperformances.rnThe paper presents a Modeling & Simulation basedrnapproach for facing the scheduling problem in a realrnmanufacturing system. An advanced way to use classicrndiscrete event simulation package is also presentedrntogether with the accreditation of the proposed model.