A periodic inspection and replacement policy for systems subject to competing failure modes due to degradation and traumatic events

Khac Tuan Huynh (1) , Anne Barros (1) , Christophe Bérenguer (1) , Inma T. Castro (2)

1 LM2S - Laboratoire Modélisation et Sûreté des Systèmes
2 Departamento de Matemáticas - Universidad de Extremadura

This paper deals with the condition-based maintenance of single-unit systems which are subject to the competing and dependent failures due deterioration and traumatic shock events. The main aim is to provide a model to assess the value of condition monitoring information for the maintenance decision-making. A condition-based periodic inspection/replacement policy is developed and compared with a benchmark time-based block replacement policy. Numerical results show that it is indeed useful to follow closely the actual evolution of the system to adapt the maintenance decisions to the true system state to improve the performance of maintenance policies. The analysis of the maintenance costs savings can be used to justify or not the choice to implement a policy based on condition monitoring information and to invest in condition monitoring devices.

Mots clés: Gamma process; non-homogeneous Poisson Process; maintenance policy; periodic inspection/replacement; block replacement; dynamic environment

Domaines: Autre; Probabilités [math.PR]; Gestion des risques [q-fin.RM]

Khac Tuan Huynh, Anne Barros, Christophe Bérenguer, Inma T. Castro. A periodic inspection and replacement policy for systems subject to competing failure modes due to degradation and traumatic events. Reliability Engineering and System Safety, 2011, 96 (4), pp.497-508. ⟨10.1016/j.ress.2010.12.018⟩. ⟨hal-00790728⟩