BPM wanted

Question

Hello,
I have a next problem.
I have to realize the following scheme:
ReceiveFile1 -
>|--| ->Idoc1  -> |--
|       
MultiMapping
SAP
ReceiveFile2 -
>|--|>Idoc2  -> |--
|
The short explanation is
1) We receive two message from two external system by two ReceiveFile Adapters(the receiving are an async process(!) )
2) We have to map fields from File1  to Idoc1 directly and to do multimapping fields of File1 and File2 in order to create Idoc2.
3) And then we have to send both IDOCs simulteniously to SAP system
As I understand I need to create BPM process. Please tell me what the process I need to create and what steps I need to allocate in BPM process.
I suppose the common first steps:
1) Creating Abstract Interface for FileInterface1
2) Creating Abstract Interface for FileInterface2
3) In BPM I create two Receive Steps
... and what is the next???
Thank You.

Answer 1

correct if my understanding is correct:
u have two senders file1 and file2. for creating idoc1 u use contents in file1 and for idoc2 u use both the contents in file1 and file2. send both the idocs parralely to sap.
<u>BPM:</u>
1. two recv steps to recv file1 and file2
2. first transformation step for file1 to idoc1 conversion
3. second transformation step for file1 + file2 to idoc2 conversion
4. fork step with 2 branches
5. in first branch a send step for sending idoc1 and in the second brach a send step for idoc2