fa عمومى General پژوهشي Research Flow shop scheduling problem with missing operations is studied in this paper. Missing operations assumption refers to the fact that at least one job does not visit one machine in the production process. A mixed-binary integer programming model has been presented for this problem to minimize the makespan. The genetic algorithm (GA) and tabu search (TS) are used to deal with the optimization problem. According to computational experiments on data sets, it is suggested that GA is a more appropriate method to solve this problem. GA can reach good-quality solutions in short computational time, and can be used to solve large scale problems effectively. Keywords: Flow Shop Scheduling, Missing Operation, Mixed-Binary Integer Programming, Genetic Algorithm, Tabu Search. 0 0 http://ijorlu.lahijan.iau.ir/browse.php?a_code=A-10-1-48&slc_lang=fa&sid=1 R. Ramezanian Ramezanian@iust.ac.ir 1003194753284600174 1003194753284600174 Yes M. Saidi-Mehrabad 1003194753284600175 1003194753284600175 No D. Rahmani 1003194753284600176 1003194753284600176 No