MTTR- Relation of failure rate & down-time

Q.  What would happen, if an equipment possesses reliability and maintainability to the maximum extent in accordance to MTTR?
- Published on 25 Sep 15

a. Failure rate is higher & downtime is longer
b. Failure rate is lower & downtime is longer
c. Failure rate is higher & downtime is shorter
d. Failure rate is lower & downtime is shorter

ANSWER: Failure rate is lower & downtime is shorter

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    Discussion

  • Satyawati Patil   -Posted on 07 Oct 15
    MTTR stands for Mean Time to Repair. It specifies the expected time of repair. Since the MTRR deals is inversely related to the failure rate, it can be represented as,

    MTTR = 1 / λ

    As this failure rate exhibits inversely proportional relationship with the mean time to repair, so the equipment with maximum reliability and maintainability has absolutely minimum (lower) failure rate and shorter downtime respectively.

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