Preventive maintenance modeling and its application in single-unit system

Using the concept of delay time,a preventive maintenance(PM) model suitable to practice is proposed.Firstly,the concept of delay time is introduced.Secondly,a target function describing the relationship between the total downtime and the PM is given,based on the technical economy analysis.Thirdly,a basic PM model for single-unit system is established.Finally,a case study is presented.