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Min Max Coverage Group giving strange Actions

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I can't find where in the planning this is set and/or how to correct...

We've set up Min/Max Coverage Groups - when we run planning the system gives the craziest actions - for the planned purchase orders. See below, this part has 2 on-hand, two sales orders one of which we can't fulfill, and an open PO for 24. After the PO is received and the second sales order is shipped we'd have exactly 20 on the shelf which is the MAX.

Why is it telling me to Postpone+Decrease the existing PO 53 days from today and then created a planned PO that has another action to decrease it from the suggestion of 20 to 4??????

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Allen Dejoux Microsoft Employee on at

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Hi,

Here are a few things to consider:

Coverage Period is reserved for Periodic Coverage. Where did the 1 come from? Was this once Periodic and later changed? See below for expected setup.

A Negative Day figure of 2 (the default) can be too low for many environments. Try setting to the Coverage Time Fence first.

A Positive Day figure of 365 is beyond the Coverage Period Of 180 Days. Try setting to the Coverage Time Fence first

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Guy Terry 28,998 Moderator on at

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Hi brittonsm,

The date 3rd July comes from the requirement date of your Safety stock demand. Your lead time is 60 days. I guess you have the Fulfil minimum parameter set to Today's date + procurement lead time. This means that the Requirement date of the Safety stock demand will be your lead time. This is, in my view, a sensible setting. When you understand that, you can see what AX is proposing might make a little more sense.

That said, I plugged your data in as best I could, and I got different results:

One thing I would try is to remove the Minimum on this item, and replace it with some other demand for 16 (e.g. I find creating a Demand forecast entry the quickest way, if your Master scheduling includes a Forecast plan). The purpose is to see if you get different behaviour when the demand is created by Safety stock versus the same demand created by something else.

Another question: do you think the Action messages are useful? I mean are they useful on this Purchased item, with a long lead time? I imagine anything with a 60 day lead is on a boat, and there is zero possibility to delay it, advance it or alter the quantity! Think about turning them off (or, perhaps turning off just the Decrease and Postpone messages).

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