An Object Event Simulation (OES) example model. You can download and inspect its code from the OES GitHub repo.
Process Design Model

A Service Desk System as a Processing Network

This minimal Processing Network model consists of three nodes: an entry node where customers arrive, a processing node where service activities are performed on customers, and an exit node where customers depart. These nodes are connected with processing flow arrows combining event/activity scheduling with object flow. The processing node's setting processingCapacity=1 means that the node's processing station is a resource that can process exactly one processing object at a time.

Simulation Log
StepTimeCurrent EventsSystem StateFuture Events