Every time a tour is performed, the system records a history of the results of that tour so it can easily be audited at any time.
To access the history of a tour, just go to the tour, then go to a particular checkpoint. Under there you will see a "Tour History" tab. Click that to see the history of all the times the checkpoint has been visited.
Furthermore, you can click an individual history item and see the checklist that was performed at that time, with the results (passed/failed), any notes that were entered and pictures that were taken at the time:
Next Topic: Inspection / Guard Tours