Stokastik envanter model kullanılarak is makinelerinin onarımında kullanılanılan kritik yedek parçalar için envanter yönetim sistemi olusturulması

In this study, we develop a stochastic inventory model for maintenance depot of the
construction machines. With this model, the inventory of critical spare parts used for the
maintenance of construction machines is managed. Proposed model is a nonlinear
stochastic integer optimization problem. The aim of the model is to find out reorder
points, and the maximum and minimum stocking levels of critical spare parts that
minimize the inventory costs. Moreover, the availability of critical spare parts is
increased. The average service level and replenishment frequency constraints are also
considered in the model. To solve the model, we propose a heuristic that contains a
modified ABC Analysis and can be implemented with the spreadsheet applications easily.
Finally, an application and cost analysis with the proposed model are performed. The comparison of total costs for the current situation and optimum inventory level that the
model proposes is performed during the cost analysis. Using inventory levels and reorder
amount found by the model satisfies more than 5% cost reduction.