Article ID: | iaor19982285 |
Country: | Netherlands |
Volume: | 53 |
Issue: | 2 |
Start Page Number: | 157 |
End Page Number: | 170 |
Publication Date: | Nov 1997 |
Journal: | International Journal of Production Economics |
Authors: | Vrat Prem, Nagarur Nagen, Duongsuwan Wanchai |
Keywords: | scheduling, programming: goal, production |
The present study considers the development of a production planning and scheduling model for injection moulding of PVC pipe fittings in a local factory. The objective is to minimize the total costs of production, inventory, and shortages. A three-stage sequential procedure is used to solve the problem. The total problem domain is divided into three subproblems by mould-machine grouping. Each subproblem is then solved as a single-machine, multi-product, capacity lot-sizing problem, with a three-month planning horizon. A linear, zero–one goal programming approach is used to generate the solution. Finally, the production plan of the first month is decomposed and scheduling for each individual machine is carried out by a heuristic procedure. Comparison of the results show that the new procedure can substantially reduce both shortage and inventory costs.