There are two ways to tell if the timing belt has been replaced. One is obvious-you are looking at a service receipt showing the replacement.
Swimlane diagrams are used whenever you need to show activities, tasks, or process steps which are being performed by different actors/roles. You can use swimlanes to group activities in an activity diagram or process flow by any category what you need: by role, by system, by department, etc.
What is a swimming pool autofill? Kona Labs defines a swimming pool autofill as the following: A pool is a container (often called swimming pool, swimming bath, wading pool, spa, or paddling pool) that is filled with water for a specific purpose such as swimming, or other leisure activities.