How does a merge work at a parallel gateway (AND)?

During synchronization, a process folder that was previously split at a branch is joined by collecting the individual process folders. In the BPMN process diagram, there are two ways to do this:

Parallel gateway

As soon as process folders with the same process number arrive at all the incoming connections of a parallel gateway with multiple incoming connections, one process folder with the process number of the activating process folder is forwarded to the subsequent objects of all outgoing gates.

Process/Subprocess

As soon as all parallel activities or processes in a Process or Subprocess object are completed, process folders with the process number of the activating process folder are forwarded to the subsequent objects via all outgoing sequence flows.