Hi, by KT session do you mean Kepner Tregoe?
As an tableau Developer, In my company we do have 3 different system-DEV-TEST-PROD.
Step-01: Once we finish creating or developing reports in DEV, We do manual change Site Path to TEST Environment Like below.
Step-02: Login to Different Sever in the list like below, here I use to select TEST Server.
Step-03: Once we tested data in the testing environment I would like to re point server to PROD. Follow steps from 1 to 2
Step-04: Tableau have version control with limited number of versions in the server. Once report is posted to tableau server, you can check version in the below highlighted location.
For the older version, please check with Server Admin for help to locate
Please go through blow links and feel free to ask questions experts.