# Failure Statistics Purge Process (FAIL.P2)
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Form Details
Form Details
Purpose
The FAIL.P2 procedure is used to purge failure statistics records from the
data base. The criteria used to deterime which records are purged is based on
a user defined cut-off date. All failure statisics records whose month and
year designation is less than or equal to month and year of the cut-off date
entered will be deleted. Because the MTBF calculation is based on historical
data it is important to insure that a sufficient amount of data is available
to provide a meaningful calculation. This determination will be dependent upon
the established norms for your industry.
Frequency of Use
The frequency with which a purge is performed will vary depending on such
factors as available disk space and the amount of on-line history desired. At
a minimum purges should be performed on a yearly basis. Purging on a quarterly
or even a monthly basis may be desirable if the volume of transactions is
fairly high.
Prerequisites
It is strongly recommended that a full account backup be performed prior to
executing any purge process. It is also recommended that this be a permanent
backup so that any records which were purged can be restored at a later date
if required.