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MTTR - Mean Time to Repair Software from BQR |
Mean Time to Repair
| MTTR is the most common measure of maintainability prediction. It is the average time required to repair a failure (corrective maintenance) and return the equipment to normal operating condition in which it can perform its intended function.
The MTTR module uses provided data about the removable (replaceable) components in a system to generate maintenance parameters and calculations such as task definitions, preparation, Localization, percent Isolation, Alignment and more. The MTTR can be used to calculate availability of equipment or a system. Availability is the probability that a system is in an operable state at any given time and is based on a combination of failure rate and MTTR.
Key Benefits of the MTTR
- Identifies potential down time and maintainability problems
- Assists in repair/replace analysis
- Assistis in planning necessary resources (personnel, tools, test equipment, etc.)
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Is the average time required to correct a failure and to return the equipment to a condition in which it can perform its intended function. The sum of all repair time incurred during a specified period (including equipment and process test time, but not including maintenance delay) divided by the number of failures during that period.
Features:
- MTTR for each composite block is calculated as average (by failure rates) of sub blocks maintenance time (replacement or/and repair time depending on sub block repair type)
- MCTmax for each block presents maximal confident repair time for specified confidence, supposing lognormal repair time density
- Allocates top-down MTTR requirements
- Defines different failure modes with different tasks for every assembly
- Task definitions such as: Preparation, Localization, Isolation, Alignment and Checkout
- Handles the maintenance trees (no limit of maintenance levels & number of assemblies)
- The MTTR tree can be built-up from the CARE® project tree assemblies or components
- For every project tree, many maintenance trees can be defined according to the maintenance concept
- Simple definition of assemblies connections using a standard library of standard Remove and Replace times
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