This paper presents a new mathematical model for a bi-objective job shop scheduling problem with sequence-dependent setup times that minimizes the weighted mean completion time and the weighted mean tardiness time. For solving this multi-objective model, we develop a fuzzy multi-objective linear programming (FMOLP) model. In this problem, a proposed FMOLP method is applied with respect to the o...

Extensive research has been devoted to resource constrained project scheduling problem. However, little attention has been paid to problems where a certain time penalty must be incurred if activity preemption is allowed. In this paper, we consider the project scheduling problem of minimizing the total cost subject to resource constraints, earliness-tardiness penalties and preemption penalties, ...

Makine çizelgeleme problemlerinde tüm makineler daima kullanılabilir durumda değildirler. Planlı bakım, öğle yemeği ve dinlenme molaları gibi nedenlerle periyodik olarak kesintilere uğrayabilmektedirler. Ancak literatürde genellikle bu durum göz ardı edilmektedir. Bu çalışmada kullanılamayan zaman dilimlerinin sıra bağımlı hazırlık sürelerinin olduğu ilişkisiz paralel makine problemi ele alınmı...

This paper introduces a tabu search heuristic for a production scheduling problem with sequence-dependent and time-dependent setup times on a single machine. The problem consists in scheduling a set of dependent jobs, where the transition between two jobs comprises an unrestricted setup that can be performed at any time, and a restricted setup that must be performed outside of given time interv...

The frequent changeovers in the production processes indicate the importance of setup time in many real-world manufacturing activities. The traditional approaches in dealing with setup times are that either to omit or to merge into the processing times so as to simplify the problems. These approaches could reduce the complexity of the problem, but often generated unrealistic outcomes because of...

This paper presents the salient aspects of a simulation-based experimental study of scheduling rules for scheduling a dynamic job shop in which the setup times are sequence dependent. A discrete event simulation model of the job shop system is developed for the purpose of experimentation. Seven scheduling rules from the literature are incorporated in the simulation model. Five new setup-oriente...