A preventive maintenance policy based on dependent two-stage deterioration and external shocks. (April 2017)

• Record Type: Journal Article
• Authors: Yang, Li; Ma, Xiaobing; Peng, Rui; Zhai, Qingqing; Zhao, Yu
• Is Part Of: Reliability engineering & system safety. Volume 160(2017)
• Page Start: 201
• Page End: 211
• Publication Date: 2017-04
• Subjects: Preventive maintenance -- Delay time -- External shock -- Competing failures -- Expected cost per unit time; Reliability (Engineering) -- Periodicals; System safety -- Periodicals; Industrial safety -- Periodicals; Fiabilité -- Périodiques; Sécurité des systèmes -- Périodiques; Sécurité du travail -- Périodiques; 620.00452
• DOI: 10.1016/j.ress.2016.12.008
• Languages: English
• ISSNs: 0951-8320

Abstract

Abstract: This paper proposes a preventive maintenance policy for a single-unit system whose failure has two competing and dependent causes, i.e., internal deterioration and sudden shocks. The internal failure process is divided into two stages, i.e. normal and defective. Shocks arrive according to a non-homogeneous Poisson process (NHPP), leading to the failure of the system immediately. The occurrence rate of a shock is affected by the state of the system. Both an age-based replacement and finite number of periodic inspections are schemed simultaneously to deal with the competing failures. The objective of this study is to determine the optimal preventive replacement interval, inspection interval and number of inspections such that the expected cost per unit time is minimized. A case study on oil pipeline maintenance is presented to illustrate the maintenance policy. Highlights: A maintenance model based on two-stage deterioration and sudden shocks is developed. The impact of internal system state on external shock process is studied. A new preventive maintenance strategy combining age-based replacements and periodic inspections is proposed. Postponed replacement of a defective system is provided by restricting the number of inspections.