In developing countries equipment are frequently idle or even permanently damaged from lack of adequate maintenance and repair facilities.Low utilization of capacity may be due to various factors, but reasons frequently given are shortage of skilled personnel, parts, and tools.The problems of maintenance and repair increase with the number of types of equipment used. In developing countries we find many types of equipment made by different countries. Parts and special tools will be difficult to obtain.To provide maximum operating time at minimum maintenance cost some practical methods have been applied: 1. Giving incentive to the group of personnel which successfully operate at a definite time with minimum downtime. 2. Using reserve units as sources of parts.It was found that these methods are economically fair.