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 the purpose of a Pump Track? The purpose of a pump track is to safely and properly increase the skill of the rider by learning to use. momentum gained on the backs of the small rollers to propel the rider forward (known as pumping) and maintain speed in a controlled environment.