Using PIRS, PMRP and MRP adopt time conflicts.

[maddyyi]

Use separate planning horizons for PMRP and MRP, and allow for phase inconsistencies within the time periods. PMRP evaluates capacity for the current month, while MRP releases production recommendations based on the first working day of the month as the demand date.

[OwenLiu]

Added Manufacturing tag. Please remove other tags.

[Corey]

Hello @maddyyi

Do you mean that the PIR should not be the 1st working day? and what is your expectation?
BTW, KBA is attached for your referenece.
https://me.sap.com/notes/2825726

Thanks and regards,
Corey