Check the access first
Before quoting, not on the day.
Rarely the driving. Usually a pickup point that doesn't work and a schedule with no loading time in it.
Forty people take longer to board than anyone allows for, and a venue that looks fine on a map may have no legal place for a coach to stop. Checking access first prevents most of what goes wrong on the day.
Then timings have to be realistic. A schedule built on best-case traffic fails the first time there's rain, so we build in the margin and tell you where it is rather than hiding it.
And the paperwork should be offered before it's requested. Operating authority, insurance and driver licensing are the basis of trusting a company with a group of people.
Before quoting, not on the day.
Loading time counts, and so does traffic.
Authority, insurance and licensing, before you book.
Date, headcount and itinerary. Free, within one business day.