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Excellent post Skip.

I might add though something like this. It depends on the amount of
maintenance being applied. If its a year (or more) there will be
quite a bit more research needed, IMO as the number of PTF's needing
researched goes up (exponentially?) .

A long time ago I had a reason to put on 3 years maintenance  for TSO/
e (I think this was in early 1990's) the smprpt was on the order of
200 pages IIRC 80 percent of the issues was a missing PTF. After
getting the PTF (some fighting with IBM) the SMPRPT was down to a
manageable (IMO) 10 pages. That missing PTF cost me 40+ hours of
arguing (and meetings) with IBM.

The gist of this is there is no hard and fast rule (IMO) as to how
much research is needed. You can say each PTF to research cost x
amount of time and I will say I disagree as it really depends on the
expertise of the sysprog.

Ed


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