Question Regarding Planning Calendars and MRP Results

5 pts.
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SAP MM
We have successfully implemented use of planning calendars (Z51 and Z56) for scheduling STO creation during 2458 MRP.  Results have been as expected in creating STOs in shipping plants 2151 and 2156.

Using PDT of 2 and GRT of 7 for all materials in 2458…along with X1 lot size.

[o:p] [/o:p]

One surprising thing…the slotting of planned orders seem to “group” into weekly requirements as the time horizon moves out.   Why would the planned orders only calculate once a week after reaching a date in the future (Nov-16 and out)?  There are daily PIR that should require two orders per week as per the calendar.  We saw the same thing happen without use of planning calendars and our MM data showed PDT 4, GRT 6 and period lot size of D1 (daily).

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