Not the theory. The places where the document exists, is correct, and still fails to reach the person who needed it.
There are two documents, and things get lost between them
French hospitality training draws a line most templates ignore. The sheet you fill in facing the client is not the sheet your services work from: one is a contact sheet, the other an execution sheet. What the client said and what the kitchen receives are two different documents. The handover between them is where detail evaporates, and a template that is only the first one is half a system.
The kitchen needs it days before you think
Purchasing and rotas are planned from the sheet, not from the event. Caterers put the chef cutoff at 48 to 72 hours before service. A French trade reference puts full distribution at three weeks out, because that is when orders go in and staffing is built. A sheet finalised the day before is not a late sheet. It is a sheet that arrived after the decisions it was meant to inform.
One briefing is never enough
The same reference is blunt about it: brief twice. Once with the team leads, once with the floor teams. Information dies between the two. If your whole distribution is emailing a PDF, you have done neither of them.
The guaranteed count only moves up
Once the count locks, commonly 72 hours to five working days out, it can rise but never fall. Everything is bought and staffed from it. If fewer guests turn up, the client still pays it. A sheet that shows a single number, with no lock date and no note on who sits outside it, hides the entire commercial logic of the event.
Some information is carried by a person, not a document
A head waiter verbally agreed that a client could leave equipment in the room overnight. Then he left the company. The week of the event, management said no. The information existed, but only in one head. This is the exact failure the sheet exists to prevent, and the one it most often fails at.
Nobody debriefs
The same trade source names this one directly: there is almost never a debrief after the event. So the sheet never improves. What went wrong in March goes wrong again in June, because nothing wrote it down while anyone still remembered.