Flexible Flow Shop Scheduling with Learning and Forgetting Effects

A. Meghdari†*, S. Fazlollahtabar‡, & H. Darband§

†Department of Mechanical Engineering, School of Engineering, Persian Gulf University, Boushehr, Iran, *Email: meghdari@pju.ac.ir
‡Faculty of Mechanical Engineering, Universiti Teknologi, Johor Bahru, Malaysia
§Department of Physics and Atmospheric Science, Dalhousie University, Canada

ABSTRACT:This paper presents a new mathematical model for scheduling flexible flow shop problem with sequence dependent setup times in which learning and forgetting effects of workers consider in setup times. Manpower have significant rule for doing setup on machines and their skill will be increase when they do similarity jobs and it is possible for them to prepare machines to process of jobs with higher speed (Learning effect). On other hand, when workers do number of new jobs on different machines therefore they will be forget the setup on before machines (Forgetting effect).

Keywords: Scheduling flexible flow shop problem; Learning effect; Forgetting effect; Manpower.