An integrated model for preventive maintenance and spare part inventory planning

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Endüstri Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2014

Öğrenci: PINAR KAYA

Eş Danışman: ZEYNEP PELİN BAYINDIR, İSMAİL SERDAR BAKAL

Özet:

The machine in any production environment is subject to failure. Although the frequency of failures can be managed through preventive maintenance activities, it is impossible to get out of failures entirely. Firms need to carry spare parts inventory to cope with failure and ensure smooth operations through preventive maintenance. In other words, preventive maintenance and uncertain failures can be considered as the major reasons of spare part inventory. Therefore, planning preventive maintenance activities and managing spare part inventory should be handled together. In this study, we present a Dynamic Programming formulation of the joint problem of the preventive maintenance and spare parts inventory planning. The aim is to minimize the total expected cost over a finite planning horizon. Since the Dynamic Programming formulation is computationally intractable for long planning horizons and a system with a large number of machines, three heuristic approaches are proposed: (i) Myopic approach, (ii) Stationary policy and (iii) Steady-State approximation. Through computational analyses, effects of problem parameters on the performances of the proposed heuristics are investigated.