During my first year studying the business process of this ERP system, I can't but create a flowchart. ADempiere is the first ERP system I've studied, and since then I've been studying the system and the business flow. I haven't had a chance to check the new fork: iDempiere, but I'm excited to check it out.
I hope the flowcharts will help you understand ADempiere ERP system. :)
Then to my surprise, someone from Germany translated the flowchart I've created and was kind enough to inform me and email me a copy.
GERMAN VERSION of Sales Order Map, thanks to Thomas Kreser of Catura.de
Here's the link to may ADempiere Wiki Page - Jairah.