Do you have any documentation from real life implementation?

Hi Experts,

I am working on a project in a Support capacity and I hope come to understand a lot about what has been implemented but what I am missing are the decisions behind the design.

The environment involves MM, SD, FI

and on a monthly basis, data is extracted from R3 to BW. Some through Process chains and others through flat file loads.

Do you have any documentation from real life implementation which can help me see the steps you went through to decide on specific Business Content objects, reasons for selecting specific fields, the logic for mapping particular fields to the others in BW, transfer and update rule discussions, etc. i.e to see and understand the final design before it was built in BW?

Thanks.