Determining the Availability of a Single Component
If you wanted to calculate the availability of a particular component, use the availability equation with the MTBF and MTTR for that component. If the component in question had an MTBF of 100,000 hours and an MTTR of 6 hours, then we could calculate the availability to be 0.99994. The resulting downtime would be about 31.5 minutes per year for that component as calculated in Figure 2-2.
Figure 2-2. Finding the Downtime of a Single Component
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