Some processes require a "Wait for..." event (for example, Wait for Adapter Message) to continue processing. This occurs when the process requires an external application to send an additional request.
For example, a new order arrives, and because the total is over $100,000, it requires approval before processing. You may notify a group of approval managers by email, then any of the approval managers can respond by email or through a web interface for approval. Figure 42 illustrates this set of process definitions.