Modelling quality in replacement and inspection maintenance

► The maintenance cost and reliability of a simple system are related to the quality of inspection and of replacement components. ► The system can be in one of three states: good, defective or failed. ► Component lifetimes follow a mixture. ► The mixing parameter and the rate of defect induction at inspection are surrogates for the quality of maintenance intervention. ► This approach allows supplier choice in preventive maintenance to be modelled.