Beginning DMN modelers might describe a decision service as that rounded rectangle shape in a DRD that behaves similarly to a BKM.  That’s true, but it is a special case.  Fundamentally, a decision service is the unit of execution of DMN logic, whether that is invoked by a decision in the DRD, a business rule task in BPMN, a decision task in CMMN, or an API call in any external client application or process.  Whenever you execute DMN, whether in production or simply testing in the modeling environment, you are executing a decision service.

In Trisotech Decision Modeler, that is the case even if you never created such a service yourself.  That’s because the tool has created one for you automatically, the Whole Model Decision Service, and used it by default in model testing.  In fact, a single decision model is typically the source for multiple decision services, some created automatically […]