Maintenance decision making tool reaching a compromise between maintainability and reliability performances

Edouard Thomas (1) , Eric Levrat (1) , Benoît Iung (1)

1 CRAN - Centre de Recherche en Automatique de Nancy

An original maintenance decision making tool based upon Bruss theorem has previously been investigated by the authors to select the optimal last production stoppage convenient to operate a maintenance action on a component according to its degradation conditions. This stoppage is optimal with respect to antagonistic criteria such as maintainability and reliability combined. The approach is also opportunistic in the sense that maintenance is developed during production stoppages already planned. However the optimality with respect to the separate criteria alone has not been taken into account to find this global optimal stoppage. The present work aims at providing, for this tool, a way to eliminate stoppages a priori unacceptable for one criterion, so that this stoppage cannot be proposed as the final global solution. This will be done with the help of a maintenance expert. Case studies are presented and commented. Two criteria have been considered, namely maintainability and reliability, which are two key elements to bring together to perform a maintenance action. These criteria will also be used for emphasis on the difference between local optimal decisions and a global optimal decision.

Mots clés: Maintenance decision making; Production stoppage; Bruss algorithm ('Odds algorithm'); Performance criteria

Domaines: Automatique / Robotique

Edouard Thomas, Eric Levrat, Benoît Iung. Maintenance decision making tool reaching a compromise between maintainability and reliability performances. 17th IFAC World Congress, Jul 2008, Séoul, South Korea. pp.907-912, ⟨10.3182/20080706-5-KR-1001.2477⟩. ⟨hal-00202686⟩