Hi Thomas ,
Thanks for at starting point! byt yes i understand the complexity of the topic but it would be great if some can please share some links!
And please help me understand how the Sales area data is assigned and why? yes i understand that it is a combination of 3 things you told but why assign it to a BP(Master data)?
and can you please confirm me that while creating any transaction against the BP the sales area data of that BP has to be extended?>