Walk into any GM's office on the morning of the monthly close. You will see them flipping through a 14-page P&L and they will already know the result before page 2. Because the only lines that matter for the daily job are the first four.
The four lines
A GM who can answer these four questions in 30 seconds is doing the job. A GM who needs to read page 8 (utilities by sub-meter) to understand the month is either not doing the job or has been handed a P&L that is too granular to be useful as a management tool.
What this misses
The "top 4 lines" approach misses everything below GOP — and that is fine for the GM's daily work but dangerous if it extends into how they communicate with ownership. When the owner asks "how was the month," the answer "GOP was on budget" is incomplete. NOI could have been off because of an unbudgeted property tax assessment, a utility rate increase, or an insurance renewal. The GM who reports GOP without checking the lines below it is the GM the owner stops trusting.
The reading routine
A disciplined GM reads the P&L in a fixed sequence: top 4 lines for the trend (5 minutes), variance commentary for anything off by more than ±3% (15 minutes), departmental P&L for the worst-performing department (10 minutes), undistributed and fixed for any surprise lines (10 minutes). Total: 40 minutes per month. The variance commentary IS the value of the close — not the numbers themselves.