CREDIBILITY-BASED FUZZY PROGRAMMING MODELS TO SOLVE THE BUDGET-CONSTRAINED FLEXIBLE FLOW LINE PROBLEM

Document Type: Research Paper

Authors

1 Department of Industrial Engineering, College of Engineering, University of Tehran, Tehran, Iran

2 Department of Industrial Engineering, College of En- gineering, University of Tehran, Tehran, Iran

Abstract

This paper addresses a new version of the exible ow line prob-
lem, i.e., the budget constrained one, in order to determine the required num-
ber of processors at each station along with the selection of the most eco-
nomical process routes for products. Since a number of parameters, such as
due dates, the amount of available budgets and the cost of opting particular
routes, are imprecise (fuzzy) in practice, they are treated as fuzzy variables.
Furthermore, to investigate the model behavior and to validate its attribute,
we propose three fuzzy programming models based upon credibility measure,
namely expected value model, chance-constrained programming model and
dependent chance-constrained programming model, in order to transform the
original mathematical model into a fuzzy environment. To solve these fuzzy
models, a hybrid meta-heuristic algorithm is proposed in which a genetic al-
gorithm is designed to compute the number of processors at each stage; and
a particle swarm optimization (PSO) algorithm is applied to obtain the op-
timal value of tardiness variables. Finally, computational results and some
concluding remarks are provided.

Keywords


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