Before you review the sub sections of this section, you should understand some definitions:

Availability = (Number of Seconds in the month - Total time of the outages in seconds) / Number of Seconds in the month

Availability during maintenance = (Number of Seconds in the month - Total time of the maintenance in seconds) / Number of Seconds in the month

Mean Time To Repair (MTTR) = Total time of the outages in seconds / Total number of outages

Mean Time Between Failures (MTBF) = (Number of Seconds in the month - Total time of the outages in seconds) / Total number of outages


** Number of seconds in a month is dependent on the number of days in the month:

28 Days = 2419200 seconds
29 Days = 2505600 seconds
30 Days = 2592000 seconds
31 Days = 2678400 seconds

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