Alternate BOM

[Former Member]

Hi,

I was wondering how alternate BOM is used. For example, if i Have two BOMS for same material (Alt 1 and Alt 2 BOMS). How does MRP know how to generate requirements for BOM 1 vs. BOM 2? Basically where is the separation for demand determined between each alternate BOM?

Thanks, Erik

[Former Member · Accepted solution]

Hi Erik,

BOM alternative selection in MRP is controlled by the settings in Material masterMRP4 viewBOM Explosion--selection method

Method for Selecting Alternative Bills of Material

Indicator determining the selection of the alternative BOM when requirements are exploded in material requirements planning.

Use

With Selection by order quantity, the system chooses the alternative BOM into whose lot size range the order quantity falls. The lot size range and area of validity of the BOM apply.

With Selection by explosion date, the system chooses the alternative BOM into whose area of validity the date falls according to the setting BOM via dates.

With Selection by production version, the system chooses the alternative BOM defined in the valid production version. The lot size range and area of validity of the production version apply.

With Selection only by production version, the system chooses the alternative BOM defined in the valid production version. The lot size range and area of validity of the production version apply.

If no production version is found, no production orders or process orders can be created.

Thanks,

Rajanikanth

[Former Member · Accepted solution]

Thank you everyone! Very helpful!

Just last question. If I am using production version. How does MRP know what production version to use when creating a production order. I see the link to the BOM..just wondering how MRP knows to produce for a certain production version?

Thanks again, Erik

Edited by: Erik Kraus on Sep 9, 2010 4:16 PM

Edited by: Erik Kraus on Sep 9, 2010 4:35 PM

[former_member184655]

Dear Erik,

1.During MRP if you want the system to consider both the alternative BOM means create 2 production versions in C223 or else

through MRP4 view and assign the each alternative BOM to individual production production version for same or different lot size

and validity date.

2.If both the production version is having same lot size,validity date means then allot a quota arrangement for the 2 production

versions so that the system considers both the BOM and plan accordingly.

3.If quota is not maintained means defaultly the system always picks the first production version for planning (assuming both prod

version has same lot size and validity date).

4.Or else while giving the PIR itself if you want to allot it to a particular Prod version means ,assign it in MD61 and save the data.

Check and revert

Regards

S Mangalraj

[Former Member]

Hi,

There are many ways, if you have two boms for one fert, system throws popup giving two Boms, then user has to select.

If you have many Boms then you have to go for Prod versions

In prod versions also manual and automatic through lotsize

Please fo thtough thr lines below

Suppose you have 2/3 Routings and 2/3 alternative BOMs to produce one FG.

How system will come to know which BOM and Routing to be used. This is done thru Prod.Version.

In production version we maintain the combination of BOM and routing.

Also it can be designed with lot size or validity period.

Go to MM02--->MRP4 / Work scheduling view -

---

> Prod.Version.

Enter the validity period and lot size.

After entering the reqd. routing no. and BOM alternative , carry a check.

After getting the Green signals ,Continue.

Thus you have saved the prod. version.

Mass processing TCode- C223.

No. First of all need not worry about the BOM explosion.

As I told you earlier which BOM and which Routing is decided by Prod.Version.

So in MRP the active prod.version only will be considered. Thus active BOM and active Routing will be used for MRP.

The question comes: How to deactivate the alternative BOMs and Routing?

Two Ways:

1. You lock all other non-relevant Prod.Versions in MM02 of the FG/SFG material.(Every alternative BOM and routing forms a Prod.Version) Thus even if there are 2/3 prod.versions System will go and check for Unlocked prod. version and use it.

2. If you don't want to do this business of "Lock & Unlock" just place the required version at the first place in list of prod.versions in MRP4 view of the material.

Once system finds the first prod.version it will not spend energy in searching other alternatives.

Also please.don't forget to maintain the selection value of "2" in MRP 4 view for BOM selection.

This will enable you to start the use of prod. version functionality in SAP-PP.(very good tool for practical purposes, costing and MRP).