what are connection between...

what are connection between purchasing module and order management what all the impact will happen in order management if you give purchasing module ecan any one give me the answers....

Direct relationship between

Direct relationship between PO & OM
1. Internal Req and Internal SO
Suppose you have to inventory organization A & B (with in / out side the same OU). You want to ship a material from A but its not available there . Then you create an IR in A..You create an ISO in B against that IR . You ship the material out of B through ISO..you receive it in A..finally ship to customer out of A
2. Drop Ship Sales Order
3. Back to Back Order


Many Indirect relationship
1. CTO and ATO items if require OSP
2. Planning engine considers the demand from OM and prepares the Req accordingly