How to manage the alternative / interchangeable material in a BOM

Question

Dear Sir ,
firstly i appreciate any effor to handle this problem ...
secondly excuse me for long problem description and details .
thirdly consider it as a challenge for you .
Suppose we have a (Finished Goods -> M1,M2) and (Raw Materials -> x1, x2 , x3 , y1 , y2 ) , Suppose the BOMs are :
M1—( x1 , x3 ) , M2—( x1 , x2 ).
- We receive Change notes type ( A , B , or C ) from the designer :
Type (A) : For M1 that x1 will be replaced by y1 --> (Stop use of x1 for M1)
or type (B) : For M2 that y1 will be Alternative for x2. (It mean that we can use both of x2 & y1 alternatively)
or Type (C) : For M2 that x1 used qty in the BOM will be changed (change in Qty.)
Find the flow chart in order to know the requirements of the business .
So how i can control this bussines for each type (A,B,C) ?

Answer 1

dear,
all alternative at SAP system can you handle by many  method ,
1- if you didn't use this item again related to all BOM you can use
follow up material method .
you can use it at master data tap "mrp4" put discontinue indicator 1 also, put the follow up material.
after that go to specified BOM and link the follow up material item by follow up group,
2- if you will use  two alternative item parallel you can use
alt.item method :
you make alt. item related to 2 item at one BOM , it will depend to strategy method
3- if you know the date that the old material will sufficient your production ,you can use the
changing note method
you will create changing note and after that apply it at the BOM .
thx.
Amira