Hi Tomasz,
thanks a lot for your help.
In your example, I should have ME84 run in job triggered by event, correct?
I definitely understand the advantages of kanban in regards to simplicity. Unfortunately my management requires a solution that is 100% system controlled due to several reasons. Some of them being serial number profiles (possible with kanban?) and respecting shares for multiple vendors.
Given that, I guess your suggestion with automated schedule lines should solve that for me (although I am still not sure if I have to wait for MRP to run, even though the SA release profile is set to "changes"). Further I can definitely use quota arrangements with Schedule Agreements so the shares should not be an issue anymore 
Thank you very much for all your help!!
Alex