Okay, what about this scenario:

You are called to troubleshoot, and it takes a few hours. You open every box. You find something very simple to fix like a broken wire or bad splice. To “fix” the problem is no more than a minute. Do you quote to repair it at a price then that covers your extra time that it took to find the problem?

Does this diagnostic fee only apply to resi work? An industrial machine could take a lot longer and require changing certain parts to really narrow done the problem.

Okay, another case: “I have a new two story foyer fixture I’d like you to install. Also I have a fixture lift to install as well. How much?” We just told them T&M. from our experience these lifts require a dedicated circuit, and we didn’t know what it would take to get it up to the second floor. How would you flat rate this? Les, do use actuals instead of a book, or combination of the two? A-line, where do you get this book you use?