The problem of lot sizing, sequencing and scheduling multiple products in flow line production systems has been studied by several authors. Almost all of the researches in this area assumed that setup times and costs are sequence –independent even though sequence dependent setups are common in practice. In this paper we present a new mixed integer non linear program (MINLP) and a heuristic meth...

The Economic Lot Scheduling Problem (ELSP) has been well-researched for more than 40 years. As the ELSP has been generally seen as NP-hard, researchers have focused on the development of efficient heuristic approaches. In this paper, we consider the time-varying lot size approach to solve the ELSP. A computational study of the existing solution algorithms, Dobson’s heuristic, Hybrid Genetic alg...

A hybrid scheduling system of machines and lots was proposed. The system was composed of machine and lot scheduling systems which alternatively operate by an interval time during production. A machine agent corrects its own machine schedule when a process is behind schedule. The agent informs the schedule correction to the previous and next machine agents through peer-to-peer communication. The...