ABSTRACT
Kennedy et al. (2002) differentiated the MRO inventories from the other types of manufacturing inventories such as works in process and nished products, based on their functionalities. They highlighted the function of MRO inventory, which is assigned not to be sold to a customer but to ensure the proper condition of equipment. That is why the nature of maintenance material management depends on the maintenance strategy, which is mostly a combination of following:
• Failure based: operation until a failure occurs, and then repair. • Time based: examination and repair after a certain operational time or output. • Condition based: repair is scheduled using information from condition monitoring. • Maintenance prevention: construction and usage allows avoidance maintenance (maintenance-
free operation).
