The day you spot a problem, the office hears it from you, before you leave the site.
Call before you leave, the same day you spot it.
What you found.
When it becomes a problem.
Two ways out.
Tuesday, 3 p.m. The crane for Friday's truss lift is booked, but the gravel pad it has to stand on isn't scheduled until next week. What's your move?
Call the office before you leave: no pad, the lift is Friday, and it's either the pad moved up or the crane moved back.
Work it out with the excavator yourself first, so you're not calling the office about something you could have handled.
Call the office now, tell them the pad's going to be a problem on Friday, and let them work out the fix.
The most useful thing you can send up the line is time, so call today with three things ready: what you found, when it becomes a problem, and two ways out. Sorting it out with the excavator first burns days the office could have used, and they may be able to move the crane with one phone call. A call with no options hands them the problem and leaves out the fixes only you can see from the site.