A hybrid method of Pareto, TOPSIS and genetic algorithm to optimize multi-product multi-constraint inventory control systems with random fuzzy replenishments
✍ Scribed by Ata Allah Taleizadeh; Seyed Taghi Akhavan Niaki; Mir-Bahador Aryanezhad
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 985 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0895-7177
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✦ Synopsis
Multi-periodic inventory control problems are mainly studied employing one of two assumptions. The first is the continuous review, where depending on the inventory level, orders can be placed at any time, and the other is the periodic review, where orders can be placed only at the beginning of each period. In this paper, we relax these assumptions and assume that the time-periods between two replenishments are random fuzzy variables. While in the model of the problem at hand the decision variables are of integer type and there are space and service level constraints, for the shortages we consider a combination of back-order and lost-sales. We show the model of this problem to be an integer-nonlinearprogramming type and in order to solve it, a hybrid method of Pareto, TOPSIS and Genetic Algorithm approach is used. At the end, a numerical example is given to demonstrate the applicability of the proposed methodology.