M,  Maintenance,  Reliability Theory


The probability that a failed component of a system will be restored or repaired to a specified condition within the time when maintenance is performed according to prescribed procedures. The prescribed maintenance procedures include not only the way repair is performed but also the availability of maintenance resources, including people, spare parts, tools and manuals, the preventive maintenance program, skill levels of personnel, and the number of people assigned to the maintenance crew. Restoration times are commonly characterized by the log normal distribution.

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