Model Start Event Cascade through BPMN
I'm trying to model the following (simplified) workflow. Each start event has a route to the Main Task as well as an alternative route which will trigger the "previous" start event.
My problem: if Start Event 2 is triggered through a path from Start Event 3 it should not be possible to trigger Start Event 1 any more (red path): 3->2 is ok, 2->1 is ok, but not 3->1!
What would be the "right" solution here? Should I create an alternative Start Event 2 when it's triggered through Start Event 3 (seem to be redundant). Or should I solve this somehow through a logic gate if triggered through Start Event 3 then ... else ... (seems to be over complicated). Or is there a better solution?
PS. I tried to find a better stack exchange site for modelling but it seems 99% of the questions regarding BPMN are posted here. But I'm open for suggestions.
First of all, Start Events must not have an incoming Edge. It is not allowed by the BPMN standard. So you should replace your Start Events 2 and 3 within the process with intermediate Events.
The decission logic to skip or execute the Intermediate Event now representing the event of what was before Start Event 3 could be implemented in an Event Based Gateway, describing on the Edges which path to take under which condition.
