رسائل ماجيستير
English
2023
Classification of spare parts criticality: a multi-criteria decision-making framework with an application in an Oil & Gas Company
Amar Oukil, Tahra Hamed Azzan Al-Rawah
كلية الإقتصاد والعلوم السياسية-جامعة السلطان قابوس · عمان
Spare parts are inventoried items stored in warehouses for immediate response to demandrequirements of repair jobs and maintenance activities. Most oil & gas companies maintain large numbers of spare parts to ensure stock availability andavoid shortages. Due to the substantial contribution of spare parts to the total inventory cost, it isimportant to balance stock availability and the inventory holding costs of spare parts. In line withthese objectives, the specification of the spare parts to keep in stock is one of the most crucialsteps which requires the spare parts to be classified based on the corresponding criticality.Criticality is a key factor towards identifying the resources and the actions needed to reduce therisk or the impact of failures and losses affecting a process, including incidents relating toeconomy, safety, and environment, among other practical aspects.The aim of this thesis is to identify the most relevant criteria for the classification of spare partscriticality prior to assessing their impact on inventory management using a large oil & gascompany in Oman as a case study, theThe investigations are based on a methodological framework that integrates two multi-criteriadecision-making (MCDM) techniques, namely, Evaluation based on Distance from AverageSolution (EDAS) and Ordered Weighted Averaging (OWA) operator.The findings of this study reveal that less than 2.5% of the spare parts require special attentionregardless of the optimism level of the decision maker, which enables reducing substantially theinventory costs besides assisting the inventory team in deciding what to maintain in stock andwhether to add or remove items from stock.