Why your run sheet falls apart at 6pm

Almost every run sheet works perfectly until early evening, then collapses within forty minutes. It is so consistent that you can predict it from the document alone.

The cause is not that people run late. It is that the timeline was built with no slack in it, so the first delay is never the only delay.

Delays compound, they do not absorb

A ceremony that starts eight minutes late does not stay eight minutes late. Guests move slower than planned to the next space. Family photos start late and still take their full thirty-five minutes. Canapés run long because the kitchen is holding. By the time entrées are served you are thirty minutes down, not eight.

Nothing in the evening gives time back. Every element takes as long as it takes, so a deficit is carried to the end of the night, where it eats the only truly flexible thing: the dancing.

Build slack where it is invisible

Slack works best where guests cannot perceive it. Fifteen minutes in the canapé hour is invisible — people are drinking and talking and will not notice an extra quarter hour. Fifteen minutes between the main course and speeches is invisible. Fifteen minutes in the ceremony is not; it is guests sitting in the sun wondering what has gone wrong.

Put twenty minutes of slack across the pre-dinner window and you can absorb almost any realistic delay without a single guest noticing.

Photography is the most underestimated block

Family group shots are the classic overrun. Couples allow twenty minutes and list fourteen groupings. At two to three minutes per grouping — finding people, arranging them, shooting, releasing them — fourteen groups is forty minutes minimum.

Count your groupings, multiply by three, and put that number in the run sheet. If the answer is unacceptable, cut groupings rather than pretending.

Name the decision points

A good run sheet says what happens when it slips. If canapés are running fifteen minutes behind at 6:30, does the kitchen hold or does the speech order change? Decide in advance, write it down, and tell the person holding the sheet that they have authority to make the call.

Without that, every delay becomes a committee meeting in a corridor, and committee meetings take longer than the delay did.

Work backwards from the end

Most people build a run sheet forwards from the ceremony and discover the night finishes at 1am. Build it backwards from your hard finish — the curfew, the licence, the bus — and the compression shows up on paper, where it is still free to fix.