A good process has a crystal clear purpose.  It is dedicated to achieving a single, customer-meaningful, business-meaningful outcome.

This outcome can be big and abstract at the top level (Keep Promise), increasing in granularity (Walk Dogs) until you reach the lowest practical and concrete level (File VAT Return).

This means that the person running the process knows exactly what they are trying to achieve, and they (and you) know exactly when they’ve achieved it.