Suggestions Required While Doing Idoc To File Scenario

Question

Hi All,
My scenario is Idoc To File. I have to take the  Purchase Order Idoc from system "A" and send it as a XML file to system"B".
The problem here is, i have three types of PO Idoc's with different fields.
1) Purchase Order (Fields : PO Number, date, vendor, material and quantity)
2) Delivery with serial number ( Fields : delivery number, est date, vendor, material, serial and quantity)
3) Delivery using serial number with subcontracting repair ( Fields :
PO Number, date, vendor, material, serial and quantity).
I have to convert all the above PO Idoc's into Xml file format and send it to system "B".
Here i have three different Idocs one per Purchase Order , one per Delivery with serial number and one per  Delivery using serial number with subcontracting repair .
My question is, shall i need to create three different scenario's for the above requirement or shall i create only one scenario with all the fileds in file structure.
Is it possible by creating only scenario, to handle the above situation. If so where can i handle the conditions saying that the File Structure
for Purchase Order  should be (With Fields : PO Number, date, vendor, material and quantity) ,
for Delivery with serial number should be (With  Fields : delivery number, est date, vendor, material, serial and quantity) and 
for  Delivery using serial number with subcontracting repair should be ( With  Fields : PO Number, date, vendor, material, serial and quantity).
Please provide the solution for the above situation.
And suggest me which is the best method to follow.
Regards,
Venkat.

Answer 1

Prasad,
My requirement is i will process only  one Idoc at a time either it may be Purchase order or Delivery with serial number or  Delivery using serial number with subcontracting repair . So no chance of multiple targets. For example
First time i may process Idoc related to Purchase Order then at that time  only fields ( PO Number, date, vendor, material and quantity) should convert into  Xml file and pass it to system "B".
Second time i may process Idoc related to Delivery with serial number then at that time  only fields ( delivery number, est date, vendor, material, serial and quantity)  should convert into  Xml file and pass it to system "B".
Third time i may process Idoc related to Delivery using serial number with subcontracting repair then at that time  only fields ( PO Number, date, vendor, material, serial and quantity) should convert into  Xml file and pass it to system "B".
In all the cases the target is same "B" system.
I think now it is clear.
Regards,
Venkat.