Performance Analysis of Commercial Offset Printing under Dynamic Priority Rules

A profit analysis of a commercial offset printing production system working under various dynamic priority rules has been undertaken. The task is to investigate both whether and how a change in priority rules affects the system’s performance. A mutual impact of the dynamic priority rule utilized (EDD, LOR, MOR, SPT, and LPT), system workload (by means of machine utilization) and input buffer capacities have been studied. (original abstract

Exponential smoothing for multi-product lot-sizing with heijunka and varying demand

International audienceHere we discuss a multi-product lot-sizing problem for a job shop controlled with a heijunka box. Demand is considered as a random variable with constant variation which must be absorbed somehow by the manufacturing system, either by increased inventory or by flexi- bility in the production. When a heijunka concept (production leveling) is used, fluctuations in customer orders are not transferred directly to the manufacturing system allowing for a smoother production and better production capacity utilization. The problem rather is to determine a tradeoff between the variability in the production line capacity requirement and the inventory level