What does exclusive gateway mean?
Exclusive Gateways. Definition. An exclusive gateway restricts the sequence flow in such a way that exactly one alternative is selected from a set of alternatives at runtime. Accordingly, the exclusive gateway corresponds to a typical either–or decision where exactly one alternative is selected.
What is Event Gateway?
An event gateway represents a branching point in a process execution where only one of several paths can be followed, depending on events that occur. A specific event, such as the receipt of a message or timer event, determines the path that will be taken.
What is the difference between the event-based gateway and the exclusive gateway?
When a data-based exclusive gateway is used, the value of a data element is evaluated by a condition statement to determine which path the process should proceed along. An event-based gateway is required any time a decision is made by another participant based on data that is not visible to our process.
How are gateways used in the BPMN process?
BPMN Gateway is a kind of flow objects that is used to direct sequence flows of a process based on certain condition. It serves as a gate, it will determine whether to let a certain flow pass, therefore gateways possibly control the selection of outgoing flow that pass through the gateways. Now we will explain each type of gateways in detail.
When to use exclusive gateway in BPMN visual paradigm?
When using an exclusive gateway, only one sequence flow is selected. When multiple sequence flows have conditions that evaluate to true, only the first one defined is selected to continue the process. If no sequence flow can be selected, an exception will be thrown.
What are the three types of events in BPMN?
There are three types of Events, based on when they affect the flow: Start, Intermediate, and End. Events can include triggers that define the cause for the event. There are multiple ways that these events can be triggered. End Events may define a “Result” that is a consequence of a Sequence Flow ending.
How are parallel gateways represented in business flow?
Parallel gateways are represented with this shape: A parallel gateway is very different than the previous gateways because you don’t evaluate any condition or event. Instead, a parallel gateway is used to represent two concurrent tasks in a business flow.