When going into a panel I figure that one of two things will happen.
1. There will be no panel schedule
2. If there is one, it will be inaccurate.
They are usually at best a general guide, and anyone that doesn't verify the information is a fool.
I've got one customer that does require any modification to the system to be documented by red lining the complete, accurate, up to date blueprints that they keep. Working there is a pleasure.
I wish they were all that way.
I like the use of pencil on panel schedules. That way old info can be
erased and new info can be read by the next guy.
I can't stand the use of the word "new" when describing loads. Things don't stay new for any appreciable amount of time, and an electrician may not need to read the panel schedule for years.