CAC, not CSA. Do your measuring right the first time and hold them accountable to do the same. If they get it wrong go after them to improve.
Witch hunts, slackers, holding your hand... creating a standard process to address dwell time establishes standards for supervisors and drivers. Previously the guy that didn't even open the hood, look into the valley of his 5th wheel, or kick a tire could be praised for being the first out the gate. That changes soon. Many times it has been written that some of the best coaches in sports never played the game. But they understood the game and their players. Standard pre and post trips are coming which will include the supervisors learning how to do them. As I typed above, make the effort to do a good pre-trip to process and hold the supervisor accountable to know and understand the same process.
How do you find the slackers? Everyone can have an opinion if something is too long or too short. But it stays just opinions until everyone uses the same measuring stick to make the evaluation. Until the tools of Lean were initiated processes would be built on expectations not actions. EOBRs and cameras are a good example of tools that reinforce the efforts of those who try to do it right and help identify those who could get by doing it their way by staying under the radar.
Today's society tends to be lacking in the "personally accountable" bucket. Often we just need to pause and ask ourselves, is it wrong or just different? Too many people will tell you tomorrow won't succeed based on yesterday, ignoring the efforts of today.