The deck started at twelve slides. I know because I built it, on a Tuesday at Ovation with a cortado going cold beside me, and twelve slides was the entire argument. Here is the problem. Here is what we believe. Here is what we do about it. Here is how we will know it worked.
It went into stakeholder review at twelve. It came out at sixty one.
Not one person asked me to remove anything.
Every reviewer added. Legal added a slide. Product added six, because product has six lines and each line felt underrepresented. Someone senior wanted a competitive landscape, which became four slides that did not change a single recommendation. The market sizing appeared. The market sizing always appears, usually around slide nine, usually sourced from a report nobody in the room has opened.
Deck length is a confidence signal, and it points the opposite direction from the one everybody assumes.
An eighty slide deck does not read as thorough. It reads as hedged. It reads as a team that could not agree on which idea was the idea, so it brought all of them and let the client sort it out. Thoroughness is what you did before the deck. The deck is what survived it.
Twelve slides, for what it is worth, is enough for everything that matters. The problem. The evidence. The insight nobody else has stated out loud. What we believe as a result. The idea. Why the idea is defensible. What we do first. What we stop doing. What it costs. What changes if it works. What would prove us wrong. What we need from you in this room today.
Everything else goes in the appendix, and the appendix is a wonderful place. Put all sixty of the cut slides back there. Bring them out when somebody asks. Being able to answer a question you did not preemptively answer is the most credible thing that happens in a client meeting, and you cannot do it if you already spent forty minutes answering questions nobody had.
Thoroughness is what you did before the deck. The deck is what survived it.
I have watched this from inside brand strategy rooms for a decade and the mechanism never changes. Adding is free. Cutting requires somebody to say, out loud, in front of the person whose slide it is, that this does not belong. Nobody wants to be that person, so the deck grows, and the growth gets mistaken for rigor right up until the client stops taking notes around slide thirty.
I printed the sixty one slide version, spread it across the living room floor to find the twelve that were still doing work, and Barnaby immediately sat down on slide four. Truffles took the market sizing. Honestly, correct instincts. Those were the first two to go.