Lot Size Based Structure within Master Schedule

@Guto Lot Size based Alternatives should be fetched when the SO or the SOR is created. It is not only limited to SORs created by MRP, it works for MS too and even if you create a SOR manually.

So what you described is not in order.

There is a check box, in Lot Size Based in the Detail tab. Just check if it is true. Just to make sure the alternate is picked as per the Lot Size based Alternatives rule.

You can process the SOR check if the correct alternate is picked when the SO is created. If not try Update Materials and/or Operations > Update Structure Alternate for Lot Size. Based on the result, the issue can be narrowed down.

Hope this helps !

Hello,

When Master Scheduling (MS Level 1 calculation) creates master schedule receipt, it actually creates the MS receipts into the tab Sub MS Receipts (and the main reason for this is max order lot size rule => system might need to generate more than one MS receipt per day)

Anyway, when doing this we capture structure revision, structure alternate, routing revision and and routing alternate (using for example lot sized based structure rules). This is then used when MRP explodes Master Schedule receipts, to save valuable execution time for MRP engine.

When MS Level 1 calculation runs, Structure Revisions and Structure Alternates etc, are refreshed outside Planning Time Fence (PTF). Look at my two yellow marked lines outside PTF. Here I have the same setting as you have. (Ignore values inside PTF, I was playing around here).

As times goes by, my proposed MS receipts will roll inside PTF and become fixed MS receipts… and then, when they are inside PTF, we don’t refresh Structure Revision, Structure Alternate etc. That’s how it is.

But, you might log an idea for this. I am actually open to have a command that could refresh the revisions, alternates etc based on new settings.

Regards

-Mats

majose wrote:

Hello,

When Master Scheduling (MS Level 1 calculation) creates master schedule receipt, it actually creates the MS receipts into the tab Sub MS Receipts (and the main reason for this is max order lot size rule => system might need to generate more than one MS receipt per day)

Anyway, when doing this we capture structure revision, structure alternate, routing revision and and routing alternate (using for example lot sized based structure rules). This is then used when MRP explodes Master Schedule receipts, to save valuable execution time for MRP engine.

When MS Level 1 calculation runs, Structure Revisions and Structure Alternates etc, are refreshed outside Planning Time Fence (PTF). Look at my two yellow marked lines outside PTF. Here I have the same setting as you have. (Ignore values inside PTF, I was playing around here).

As times goes by, my proposed MS receipts will roll inside PTF and become fixed MS receipts… and then, when they are inside PTF, we don’t refresh Structure Revision, Structure Alternate etc. That’s how it is.

But, you might log an idea for this. I am actually open to have a command that could refresh the revisions, alternates etc based on new settings.

Regards

-Mats

Hello Majose,

thanks for your input. So it is not a Bug and I am not missing anything on my system configuration, right? IFS is simply not programmed to work as I described. Correct?

In our business case, this feature would be interesting to have. We want individual units ( lot sizes smaller than 23) to be packaged individually and bigger lots to be packed in 25 pcs boxes. 

Do you think it is odd that I am trying to do this with a master scheduled part? Is this not the industry standard? 

You also mentioned that I should log this idea. Do you mean I should open a ticket? :)

Anyways, you were already very helpful with your explanation. Thanks!!

WOW - I digged deeper into this, and in my first reply I focused sooo much on how MS drives component demand in MRP using the Sub MS receipt.

NOW I realize we have a bug in MS how we generate the alternative no:s in the Shop Order Requisitions created when we have lot sized based structures.

Report a ticket!

Sorry for the confusion @Guto 

Future glory ahead

-Mats

Hello,

Was a ticket raised for this issue and was any feedback from IFS provided?

I am wanting to implement something similar in Apps10 where an MS Level 1 Part managed product has the product structure alternate (and routing alternate) adjusted, depending on the shop order requisition lot size.

Example - Header part, managed by MS level 1 part, has two product structures - default * & alternate 1.

The product structure has a structure lot size applied, with a min lot qty setting of 100pcs, which will select alternate structure 1 at the point of the shop order requisition been created for 100pcs or more.

The default * structure contains three material lines, alternate 1 structure contains four material lines, the extra line been a ‘WIP’ version of the header code, which is managed by MRP

Running MS level 1 part for the header code creates a shop order requisition with a lot size of 243pcs.

In running MRP,  I would then expect a shop order requisition to be created for the ‘WIP’ part, but nothing is created.

When changing the header part to be managed by MRP and then re-executing, I then have the same shop order requisition of 243pcs for the header part and also a shop order requisition for the WIP part for 243pcs.

MRP should be able to see the MS level 1 part created shop order requisitions, containing the product structure alternate - any help on this would be appreciated!

Thanks.

Hello Drewbert90,

I have not heard anything back from IFS to know if there was a ticket. On our side we didn’t open any. 

Let me know what you find out. Maybe send a PM to MAjose.

Thanks!

Ooops excuse me ​@Drewbert90. Now I read that you were using Apps10.

-Mats