The two management set parameters which determine the performance of a material requirements planning (MRP) system are the lead time and the safety stock. The appropriate values of these parameters are influenced by the accuracy of forecasts over the lead time, the variability of processing time...

In this paper we consider a class of job shops with a dispatch area and a machine shop, where operational controls are exercised at the dispatch area as well as at the machine shop. For such dynamic job shops with these two levels of control, there are three categories of models. They are (1)...

In most integrated works, ingots are used as an intermediate form during the production of steel. These ingots, produced by pouring molten steel into molds, are too large to be used as input for the finishing mills which produce steel products. Hence, more manageable forms (blooms, billets and...