Extensions of the PLSP

Abstract

This chapter is concerned with extensions of the PLSP for other potential applications. We consider setup times and present how sequence dependent setup costs and times can be included. Normally more than one machine exists which is able to produce certain items. Hence, we are going to model the multi-machine case. A make-or-buy decision is incorporated by defining one machine as a “buy-machine”. Using the buy-machine, i.e. purchasing items, is one possibility to overcome capacity shortages or to obtain a more efficient capacity utilization; filling orders with delay or planned stockouts will also be treated. To take care of parent-component relationships between items, a multi-level PLSP is introduced modelling a production facility with one bottleneck. We conclude this chapter with remarks on the presented extensions, and give an overview over further modifications as well as over aspects of an integration into a material requirements planning (MRP) system.