# Failure Statistics Update (FAIL.P1)
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Form Details
Form Details
Purpose
The FAIL.P1 procedure builds the summarized failure statistics data used in
the calculation of Mean Time Between Failure (MTBF). The procedure summarizes
data from the shipment and RMA transactions into monthly records by model type
for the period you define as the month start and month end dates. It is very
important that the start and end dates represent the beginning and end of a
single monthly period to insure proper calculation of MTBF.
Because a period of time may pass between the time RMAs are first entered into the system and when the problem determination (e.g. failure codes) are entered into the system, it is recommended that this procedure be run for a period that is at least one month behind the current period to allow time for the failure codes to be logged. For example, at the end of the month of April you would run this procedure for the month of March (3-1 thru 3-31). You may want to wait two or more months if your cycle time between RMA entry and problem diagnosis is longer.
If a period is summarized to early or if an error was made in the entry of the start and end dates you may run the procedure again for the same period. The procedure will rebuild the records for the period selected.
Frequency of Use
This procedure may be run at any time, but is usually run as part of the month
end processing.
Prerequisites
None.