Defining optimal retrieval policy in an automated storage and retrieval system

Improving technology, variable customer demands, variety of products and incresing improvement of production systems has brought storage facilities, which has an important role on business operations, to a critical point. This circumstance has revealed the necessity on activating of storage systems and operations. In this study, mathematichal model, which minimizes simultaneously storage allocation, storage retrieval and storage keeping costs, is generated for an AS/RS system of an enterprise. The mathematical model has runned for small solution space and optimal solution is obtained. The existing problem has an NP hard structure that?s why this circumstance complicates to solve the existing problem with mathematical modelling in large solution space. That?s why in this paper a simulated annealing algorithm, which is a metaheuristic technique, is presented for problems that have large solution space and an optimal order policy is proposed for handled firm.