FI-MM: The integration between FI-MM in SAP-FICO

FI-MM: The integration between FI-MM happens in T-code OBYC. 
  1. When PO is created :
       ---- No Entry -----
  2. When GR is posted 
      Inventory Account dr (Transaction Key BSX in OBYC)
            To GRIR account (T.Key WRX in T-code OBYC)
  3. When Invoice is posted
      GRIR account Dr.
      Vendor account  Cr.
  4. Payment made to Vendor
      Vendor A/c Dr
            To Bank Clearing A/c Cr.
Points to know : Movement Types, Assignment of Movement types to T-keys (T-code OMJJ), Value string (I also need some information on this) , OMWN and OMWB transactions.  
There is a close integration b/w FI & MM, actually document flows from MM to FI in the following areas such as,
   
 1. Movement Types:
 
Used to enable the system to find the predefined posting rules determining how the accounts of financial accounting system are to be posted & to update the stock fields in the matrl master data.(Goods Receipt, Goods Issue, etc)
   
 2. Valuation Class:
   
Assignment of material to grp of gl account, used to determine the gl accounts that are updated as a result of goods movement.
   
 3. Transaction/Event key:
   
Used to control the storage or filing of documents & assignment of documents.Used to differeniate b/w various transactions such as goods movement tht occur in inventory.
   
 4. Material Type:
   
Each material should assign mtrl type in mtrl master record used to update whether changes made in qty are updated in material master record & change in value also updated in stock account.


Happy Blogging,
Dinesh