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.
Some of the common uses of flowcharts include: Once the use of the flowchart is known, the next step is to select the best type of diagram to represent it. This could be a basic flowchart, a swimlane flowchart, a value stream map, or any of several other types.