We are installing AX 2009, and have encountered the following issue:
All of our in house production items are made up of at least 1 phantom BOM (as we do not stock these) and a possible subassembly BOM, plus addiional BOM lines. we have found that the parent BOM item can have a big difference between the order date (when the production can be started) and the delivery date ( the date the production can be completed). This is not only driven by capacity reservation, but the the different times that master scheduling believe the phantom and subassembly BOMs can be produced.
For example: product A is made up of phantom BOM 1 & 2, as well as 6 other BOM items. There is a demand on product A which needs to be fulfilled within 2 weeks.
master scheduling is run and phantom BOM 1 can be made in 14 days as all materials are in stock, except 1 which has a lead-time of 7 days, with an issue margin of 7 days.
Phantom BOM 2 cannot be made for 60 days due to the leadtime of a component material.
The parent BOM therefore has a order date of the today plus 14days, and a delivery date of today plus 60 days.
We would only firm the planned works order for the parent item when we were able to make all the product, i.e. today plus 60 days. we would not make and stock the phantom item BOM 1.
However the planned purchase orders that are generated are telling us to order the missing materials from phantom BOM 1 today in order to make in 14 days as per the original requested date of the parent item. there is no action message to postpone this purchase order.
this would cause us to commit to material stock which was not required.
Is this correct AX behaviour? Is there a parameter/ process that I am missing?
Any advise gratefully received