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The closer critical spare parts are to the system, the faster it will be able to be repaired, as this eliminates the delay involved in ordering parts from the manufacturer and waiting to receive them. Also, the clarity of any instructions on how to repair an item will greatly contribute to the speed
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If an item is repairable, it will be used for a longer time, and the user will become more familiar with its operation. This will decrease the MDT because the user will be able to detect abnormal operation sooner, and the system will be repaired before the problem becomes too
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By designing a system to be user-repairable, the MDT will be considerably decreased, as it will not have to be taken out of service for long periods of time while it is being repaired by the manufacturer (which of course includes time spent in transit to and from the
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First, the fact that the system is down must be identified, and maintainers notified & brought to action
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Preventive maintenance checks are often intrusive and require the system to be down (unless
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Many forms of mechanical or electronic equipment require periodic intrusive calibration.
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time that a system is non-operational. This includes all downtime associated with
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System downtime is usually required to bring new features to the system.
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Reliability, Maintainability and Risk: Practical
Methods for Engineers
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A more reliable system that doesn't fail often reduces the Down Time.
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The inclusion of delay times distinguishes mean down time from
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The problem must be identified and the faulty part identified.
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250:Replacement parts needed (if any) must be obtained
325:Provide the user with a repair support system.
273:are used), e.g., checking oil in a car engine.
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256:Faulty parts must be replaced or repaired.
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301:Design the system to fail less often.
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208:or administrative delays.
352:. Elsevier. p. 22.
346:Smith, David J. (2011).
328:at which it is repaired.
448:Reliability engineering
267:Preventive Maintenance.
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198:preventive maintenance
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218:mean time to repair
262:SCHEDULED DOWNTIME
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271:prognostics
212:Description
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309:repairable
204:, and any
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184:) is the
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