Choice of a periodic on-condition maintenance policy

A condition-based replacement and spare provisioning policy for deteriorating systems with uncertain deterioration to failure

“…In fact, their condition-based replacement policies assume in advance that the number of available spares on hand is infinite and each desired spare could be provided immediately. Similarly, most of other studies (Amari and McLaughlin, 2004;Barbera et al, 1996Barbera et al, , 1999Chen et al, 2003;Chu et al, 1998;Coolen and Dekker, 1995;Marseguerra et al, 2002;Moustafa et al, 2004;Park, 1998;Pellegrin, 1992;Wang, 2003) for CBM policies also suppose that unlimited spare parts are always available. Unfortunately, there exist several kinds of time lag between the desire/order of spares and their arrival.…”

“…The objective of these models is to determine the states for which the unit is replaced in order to gain the minimum expected maintenance cost. The other type is to model the system deterioration with the application of renewal models (Barbera et al, 1996(Barbera et al, , 1999Bérenguer et al, 2000;Castanier et al, 2001Castanier et al, , 2005Chu et al, 1998;Dieulle et al, 2003;Grall et al, 2002a,b;Park, 1998;Pellegrin, 1992;Wang, 2003) ith deterioration level X f;j deterioration to failure of the unit j corresponding to the current life cycle X f deterioration to failure, i.e. the deterioration level just when unit failure occurs X i f ith deterioration levels just when failure occurs, i ¼ 1; 2; .…”

Retour d'expérience et évaluation de stratégies de maintenance

“…La loi de Weibull, réputée pour traduire assez fidèlement l'allure du taux de défaillance mais difficile de manipulation, n'est utilisée que dans quelques travaux (Vaurio, 1997 ;Tseng, 1996). La loi d'Erlang apparaît également dans (Pellegrin, 1992). Enfin, certains travaux considèrent des lois de Poisson nonhomogènes (Christer, 1999 ;Sheu, 1998), des distributions log-normale (Siddiqui et al, 1995), la loi des valeurs extrêmes (Tseng, 1996) ou des taux arbitraires (Liu, 1998) pour caractériser le phénomène de défaillance.…”

Evaluation of a maintenance strategy by the analysis of the rate of repair

“…To begin with, a distinction is to be made between the works which treat the interventions of perfect maintenance 1,2 (making the system as good as new) and imperfect maintenance 1,3 (repairing the system to a less deteriorated state, but without completely eliminating the damage). Certain authors 4,5 imagine the two scenarios with the maintenance being sometimes perfect with the probability of p, sometimes imperfect with the probability of 1 − p. Other authors 6,7 , speak of minimal maintenance to describe an intervention which brings the system into a less deteriorated state, but without specifying the level of residual deterioration. The term corrective maintenance is applied to the maintenance strategy which restores the system to a pre-failure state 3 .…”