Goals of this lesson
- Getting to know how the semantics of the parallel gateway work
This model shows a business process with parallel gateways. When the sequence flow hits a branching parallel gateway, it starts a sub-process for every outgoing link
- In the model (in the illustration above) the first gateway starts two sub-processes (or analogical two tokens will be send on the path), that will be merged in the second gateway.
- Note that the merging gateway will not fire until both sub-processes (tokens) have arrived.
- Model 2 defines a constant duration of 4 time units (TU, hours in this case) for the upper activity and a constant duration of 1 TU for the lower activity.
- This means, the bottom sub-process has to wait 3 TU until it is merged by the gateway.
- The total lead time (or processing time) of the business process will always be 4 TU.