Optimal preventive maintenance for systems having a continuous output and operating in a random environment

• Ji Hwan Cha ^[1] ; Maxim Finkelstein ^[2]
  1. [1] Ewha Womans University

     Ewha Womans University

     Corea del Sur

     
  2. [2] University of the Free State 339, South Africa
• Localización: Top, ISSN-e 1863-8279, ISSN 1134-5764, Vol. 27, Nº. 2, 2019, págs. 327-350
• Idioma: inglés
• DOI: 10.1007/s11750-019-00508-2
• Enlaces
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• Resumen

  • We consider systems that are operating in a random environment modeled by an external shock process. Performance of a system is characterized by a quality (output) function that is decreasing (due to degradation) in the absence of shocks. Shocks have a double impact, i.e., they affect the failure rate of a system directly and at the same time, and each shock contributes to the additional decrease in the quality function. The unconditional and conditional (on survival) expectations for the corresponding stochastic quality process are obtained. The system is replaced either on failure or on the predetermined replacement time, whichever comes first. The corresponding optimization problem is considered and illustrated by detailed numerical examples.