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Microsoft Dynamics AX (Archived)

AX 4.0 - Master planning?

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Hello everyone,

I've been asked to describe how to set a min/max for a certain article in AX 4.0. I started looking around and found the master planning which, up to now, has not been used in the past 5 years by the company I work for. They did work with it before so number sequences and such are still intact.

I want to be sure I do things right here because if I don't the company will run into incorrect inventory levels and such...

The idea is to have item X in warehouse X. Item X is an item that is in high demand and is sold a lot. Because of this there should always be a minimum stock (safety stock I believe it's called?) available, lets make this 20k. Because we don't want to have too much stock there should also be a maximum stock of 80k. 

I've been toying around with the item coverage and made one that has the min/max coverage code with the above values. What I don't quite get yet (and I've tried looking for examples and reading the manual) is what the "coverage time fence", "positive days" and "negative days" do for the master planning and how these should be set up. Could someone perhaps explain or refer me to anything explaining this with examples?

I've also noticed that when you enable the warehouse under the coverage plan by dimension column in the item dimension group it will allow you to set a warehouse along with the item coverage. Is this the only way to get to this result? As mentioned above it should be possible to only give replenishment orders for Item X stored in warehouse X, not in any of the other warehouses.

Thanks in advance.

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

    Yes you need to set the dimension group to have item coverage by warehouse to set a safety stock by warehouse.

    I do not like maximum - it orders up to that figure. I would suggest you look at period and see what the usage does. If you set a maximum of 80k and you need 200k it will still suggest you purchase/buy 280k

    Coverage time fence is how far you look out into the future. If you have a lead time for  this item of 5 days why set this to look out 300 - if you have demand in 20, 50 and 100 days it would tell you to order them with an order date of 15, 45 and 95 days from today. Look at your lead time and how far ahead you want to plan or where your demand is.

    Set negative and positive days to the coverage time fence for your start to prevent the impact of them. Once you are more comfortable or want to play further with the impact of future demand and the demand coming within the expected order feel free to play with this. In the mean time read blogs like this.

    [View:https://community.dynamics.com/ax/b/msdynaxlessonslearned/archive/2014/03/03/negative-and-positive-days-one-more-time:750:50]

    Or this one

    [View:http://blogs.msdn.com/b/axmfg/archive/2012/10/12/separating-tactical-and-operative-planning-for-master-scheduling.aspx:750:50]

  • Community Member Profile Picture
    on at

    Cheers for the answer Weaverski.

    The articles you linked also helped a lot. I'll continue to toy around with the master planning and also check out the period coverage you suggested.

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