The deck, honestly
Deck production consumes an enormous share of consulting time and almost none of the value, which makes it the obvious target and worth being precise about.
What compresses well. Structuring an argument into a slide flow once the argument exists. Drafting the body text. Writing the executive summary from the detail. Adapting one analysis for a board, a working team and a steering group. Producing the appendix nobody reads and everybody requires.
What does not. Deciding what the deck should say. The storyline is the analysis, and a model asked to produce a storyline will produce a conventional one, which is the synthesis trap from the previous lesson in its most common form.
The practical division that works. The consultant writes the argument as a sequence of assertions, one per slide, in plain sentences. That is the thinking, and it takes as long as it takes. The model then builds the slides from those assertions, drafts the supporting text, and produces the audience variants.
Two cautions. Generated slide text tends toward the generically consultative, so it needs editing for specificity, and specificity is what makes a deck persuasive. And check the variants agree: an executive version generated from a detailed one tends to smooth away the caveats, which is the same failure the project management cursus identifies.
The honest observation for the profession. If a deck's value was its production quality, that value has fallen. If it was the argument, nothing changed.

