There is this from The Guide ;
9. Casing DPS Letters
While RRECS includes a standard (S009) of 0.0294 minutes per piece (34 pieces per
minute), the standard is ONLY credited in two circumstances. One was discussed above:
when the route receives fewer than 400 pieces of DPS Letters in a day, the quantity is
automatically defaulted to this casing standard. The second application of the DPS
Letters casing standard is when the route receives more than one run of DPS in a day. In
this case, the casing standard would be applied to the smaller run of DPS with the fewest
pieces. Again, this is an automatic default in the system.
Now, does this "automatic default" actually occur ? That is yet another issue to research. Anyhow, according to The Guide, this "automatic default" is supposed to occur not only during a MMS but also all year long if / when this situation occurs. For those who have been affected by this two run situation, you could look at your 4241M and see if there is any time credit for the above standard.