Management strategies of spare parts supply, used in many industrial companies usually promote a higher level of
service in relation to highly critical spare parts than in the case of other groups of parts (Campbell, 1998, p.17,18). R
Moore recommended to pay special attention to reliability, desired objectives and systematic purchase of production
maintenance parts (Moore, 1996, p.114). Therefore, it is necessary to add a degree of criticality of parts to previously
mentioned criteria determining selection of supplier and way to purchase parts.