If Allow Historical dates is unchecked on MRP run in regenerative, is it normal to receive PO suggestions with Order By in the past?
As an example,
The purchased part has a 135 day lead time
Vendor calendar has the supplier shut down for whole month of February, but otherwise 7 day per week calendar.
MRP creates a suggestion against demand of due date 4/5/21, giving an order by of October 24, 2020.
If I start at the April 5 due date, go 135 days back, remember to leave out 28 days of Feb, and you get 10/24/2020.
This makes perfect sense to me, as based on what I told Epicor, those are the facts.
Users are confused why if Allow Historical is turned off are we seeing dates in the past.
Allow Historical Dates works differently depending upon what task you are running. When you allow historical dates through launching MRP, it allow historical dates for JOBS AND PO’s. You could end up with a job schedule that meets customer need, but should have been started two months ago!
Since a lot of our material orders are under lead time, we don’t want the dates for incoming material to reflect lead time, we want our suppliers to try to meet the need dates through their internal expediting.
The solution we chose (with the help of Mr. Shoemaker, a frequent poster here) is to run MRP without allowing historical dates, and then immediately regenerating purchase suggestions WITH historical dates enabled.
That will tell us the date we need the material regardless of what the lead time actually is, in effect, telling us when we SHOULD have ordered the material. For future suggestions that are greater than lead time, the suggestions line up nicely.