IDOC or Web service for Vendor creation/updation from XI to R/3

Hi,

We have a scenario whereby the vendor master details in R/3 need to be created/updated by the data sent from XI. We are on XI 3.0 and R/3 ECC5.

The options that we need to analyse best suiting the requirement are whether to use Web Service or whether to use IDOC.

I am not very experienced in the usage of Web Service so it will be very helpful if you could please help me with the scenario build up and how it will update the records in R/3.

From the point of view of the IDOC usage, the standard IDOC CREMAS03 is available to update the Vendor master data whereby the data is sent to XI in XML format and the data is mapped to IDOC structure and pushed out to R/3. I have checked the SDN forums and there have been discussions baout certain settings that need to be configured first to enable this IDOC scenario.

Can you please help me in analysing which option to go for and what are the pros and cons of both and the complexity of implementation and if there are any rerequisites that need to be met for either option?

Please advice.

Regards,

Archana