1. In SAP you will always get integration with other modules.
SD will interact with FI,
MM will interact with SD :-
1a. Looking at MM and SD interaction first, take the scenario of a
third party order process.
This process uses a PO (which is sent to your vendor)
Also invoice verification is used further along the process to check
that the invoice you send to your customer is the same material
and quantity as that which the vendor sends to you
(but obviously shipped directly to your customer).
1b. Billing is an SD function.
But SAP needs to know, when processing a customer’s payment,
to which GL account the payment has to be processed.
For instance payment of a UK based material would be placed in
a different GL account to that of a non-UK based material.
Furthermore, a UK based customer may have a different GL
account to that of an Export customer.
This is configured in Account Determination.
2. ABAPers are there to essential do some bespoke development.
Your integration, or interaction, with them would be when specifying
the tables, fields, input fields, a simple process explanation, data
mapping (if doing an interface from one system to another) etc.
The link between SD and MM :-
1. When you create sales order in SD, all the details of the items are
copied from Material master of MM.
2. MRP and availibility check related data is also taken from MM
although you control this data in SD also.
3. While you create inbound/outbound delivery with reference to a
sales order,the shipping point determination takes place with the
help of the loading group, plant data, shipping conditions etc.
This also refers to Material Master.
4. The material which you are entering in a sales order must be
extended to the sales area of your sales order/customer
otherwise you cannot transact with this material.
There are many such links between SD and MM.
The link between SD and FI :-
1. Whenever you create a delivery with reference to a sales order,
goods movement takes place in the bacgground.
eg. In case of standard sales order, you create an outbound
goods delivery to the customer.
Here movement 601 takes place.
This movement is configured in MM. Also, this movement hits
some G/L account in FI.
Every such movement of good s hits some G/L account.
2. The accounts posting in FI is done with reference to the billing
documents (invoice, debit note, credit note etc) created in SD.
Thus this is a link between SD and FI
3. Tax determination: In case of a tax determination also, there is a
direct link between SD and MM
SD Integration points with other modules
SD module is highly integrated with the other modules in SAP.