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 Map? A Swimlane Map is a process map that separates process steps by function, department or individual. Each lane represents a different department or individual. The process map is called a swimlane because the map resembles a pool with lanes identifying the different groups in the process. Swimlane Map Template.