There is a magic in a train schedule. You know that there is certainty in your life. You anticipate the arrival and then the railroad crossing signals engaged as the familiar ringing blares out. Too often navigating in the uncertainty overwhelms and we long instinctively for a respite.
The negative to the positive of course is that there is a tyranny in a unbending schedule. If you are late, you are late. There needs to be a balance. I do not know where that balance point is, however I am certain that you need to provide that balance to keep your customer coming back.
Certainty without tyranny is a winning formula, find yours!