A Multi-item Fuzzy Economic Production Quantity Problem with Limited Storage Space

This paper extends a fruitful fuzzy EOQ (Economic Order Quantity) track of research with a multi-item model that takes storage limitation into consideration as well as a finite production rate (i.e. the products are produced to stock and not purchased). The order cycle time and the demand are allowed to be triangular fuzzy numbers. In the process industry, this is a situation that often occurs, since the production equipment typically manufactures a large amount of only one product at a time. The model is developed and solved with Lagrange multipliers. Two illustrative examples are also given.