In IBM terminology, a Program temporary fix or Product temporary fix (PTF), sometimes depending on date,[1][2] is a single bug fix, or group of fixes, distributed in a form ready to install for customers.
A PTF normally follows an APAR (Authorized Program Analysis Report[3]), and where an "APAR fix" was issued, the PTF "is a tested APAR"[4] or set of APAR fixes. However, if an APAR is resolved as "Fixed If Next" or "Permanent Restriction" then there may be no PTF fixing it, only a subsequent release.
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