To understand how Workflow Automation uses the processes you define, you should understand the following terms:
A single instance of a process, triggered by either an incoming event or a manual trigger. A process stands idle until a trigger initiates a work item. A single process may have multiple work items running simultaneously.
A step in a process that performs a specific function, such as starting the workflow, joining multiple flows, waiting for an incoming event, or stopping the workflow. For more information about activities, see Understanding Workflow Activities.
A set of rules associated with a process that determine how to respond to incoming events, such as initiating a new work item or appending an event to an existing work item. A manual trigger requires human intervention to initiate a work item. For more information about triggers, see Understanding Triggers.