On Fri, 18 May 2012 00:52:38 -0700, Walter Marguccio wrote:

>this is my understanding of the RSUmmyy.
>
>My memory could be rusty on this, but many moons ago customers were tired of 
>peeking through
>too many PTFs delivered in SMCREC, SMCCOR, PUTmmyy "recipients", and 
>complained to IBM.
>As a result, RSUmmyy was developed in order to let customer select "as few 
>PTFs as possible,
>but as many PTFs as needed".

What I remember is that RSU was changed so that customers would be able to 
apply all of the latest PTFs (FSVO "Latest") with the understanding that they 
were all tested as a group.  Because of the testing that was done at IBM, there 
is a better chance of fixing problems without introducing new ones.

In practice, many customers choose to upgrade to an RSU level than the most 
current after receiving the latest HOLDDATA, thus providing an additional 
measure 
of safety.

For information, see the CST website.  The mission statement is at
http://www-03.ibm.com/systems/z/os/zos/support/servicetest/mission.html

-- 
Tom Marchant

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