Recent Advances in Multi-state Systems Reliability by Anatoly Lisnianski Ilia Frenkel & Alex Karagrigoriou

Author:Anatoly Lisnianski, Ilia Frenkel & Alex Karagrigoriou
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

4.If the cost optimal values of v for the other distributions are at a low level, the DRMWD has higher cost optimal values of v. The reason for this lies in the high failure rate at lower states for the DRMWD.

In Fig. 5 the costs depending on v are plotted for the DRMWD, , . As one can see from Table 1, the optimal solution in the case is .

Fig. 5Costs depending on v for different

6 Conclusion

In this paper an imperfect maintenance model with both imperfect preventive and imperfect corrective maintenance actions is investigated. A sequential failure limit PM policy with infinite planning horizon is used to formulate a cost optimization problem. The remaining lifetime of the system after a maintenance action is modeled as a truncated random variable. With the help of this truncated random variable the costs of corrective maintenance actions, the mean cycle length and thus the average maintenance costs per unit time can be computed. Optimal maintenance strategies are computed with R. The resulting cost optimal maintenance strategies shows that in special parameter constellations it is cost optimal to do quasi-non-stop PM actions if the costs of PM are close to zero.

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