Design of inspection and maintenance models based on the CCC-chart

In this research, six maintenance models are constructed based on whether minor inspection, major inspection, minor maintenance and major maintenance are performed on a system. The system to study is a production process in which items produced can be classified as either conforming or nonconforming, and a statistical process control chart called CCC-chart (cumulative count control chart) can be applied to monitor the process. The maintenance models are analyzed quantitatively, and selection of models can be based on an economic consideration. The total cost can be broken down into inspection cost, maintenance cost, and the cost due to deterioration of the process. From the analytic results obtained, the choice of maintenance plan can be optimized from an economic point of view.