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 swimlane. Swimlane, also known as cross-functional flow-charts, is one of the most popular ways to describe complicated processes with multiple participants. This is a visual element used in flow chart diagrams that shows participants responsibilities for a certain part of the process.