There are several posts around that speak to how to report status. How long or how often to report status. There is one overarching principle of all status reporting. Actually there are many overarching principles, but this one is the show stopper if you don't get it right.
How long are you willing to wait before you find out you're late?
Your status reporting intervals better be well inside this duration, if you're going to be able to take any actions to correct the situation. Most other status reporting is a matter of taste, customer need, government regulations and the like.
