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Dynamics 365 Community / Forums / Microsoft Dynamics AX (Archived) / master planning priority
Microsoft Dynamics AX (Archived)

master planning priority

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Posted on by Labla 230

Hello,

we are doing some tests to use finite capacity, but results are not as expected.  Scheduling looked to be done by BOM level first than by alphabetic order and not by requested date. So if I need 10 items ‘BBB’ for 2014-05-01 and 10 items ‘AAA’ for 2014-05-02, MRP tell me to produce ‘AAA’ Before ‘BBB’.  (Assuming same work unit is use for both item, and I cannot produce both items on time). Are there some parameter or hot fix avalaible to fix this problem?

We are working with AX 2009 R6 without Production III and Process Manufacturing

thank you

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  • Verified answer
    Weaveriski Profile Picture
    Weaveriski 23,620 Moderator on at

    It does it by low level code, and then an assessment of the requirement date planning backward depending upon whether you flush forward, backward or by operation. This will be until it gets to the stat date based upon the routing and item availability.

    If you need to make AAA before BBB it will be because AAA takes longer to make.

    That said with finite you start to get into awful situations with AX2009 because of the way it plans all of the work centres together to find slots, so you might have AAA starting operation 10 and then have a week gap before operation 20 with finite - they never fixed the way they calculated this in AX2009 and only ever fixed it in CU2 in AX2012. The argument from MS is that you only finite bottleneck items, you should not finite control all of them - more of a reason because it does not work in my eyes, but that was the response I got. Having spent a few years my memory says the only finite that worked was one operation routes.

    You might find your tests mean you don't go finite, but there were exceptions to the setup that worked. Start by looking for scheduling gaps in the scheduled operations.

  • Labla Profile Picture
    Labla 230 on at

    where can I change scheduling gaps?

  • Verified answer
    Weaveriski Profile Picture
    Weaveriski 23,620 Moderator on at

    Well you cant - that is the issue, it schedules back from requirement date looking for resource gaps - there is a hard link flag that was also ignored. It was a bug that eventually for a AX2012 CU2 (?) hotfix.

  • Labla Profile Picture
    Labla 230 on at

    Thank you really much Weaveriski

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