To go from this:

to this:

requires these steps:

  1. Specify the purpose of the process.
  2. Identify the participants.
  3. Map the “happy path.”
  4. Extend the model with exceptions.
  5. Link the model to sub-processes as appropriate.
  6. Add clarifying details.

The happy path is the scenario that works out in the easiest and best way possible. It’s generally free of exceptions and features a normal progression of events, infrastructure, and the “usual” cast of characters. It’s presented from the start event to the end event in the level of detail appropriate to the purpose of—and audience for—the model.