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.
1 smart drawing tools, automatic connectors and shape library to create a swimlane flow charts of processes, algorithms and procedures; 2  ability to work in online and offline modes; in and out of browser;  export to the most commonly used picture and document formats.