A practice at Amazon, cited as the best-practice artifact for laying out the data and reasoning behind a strategic choice: instead of a slide deck, the case for a decision is written as a six-page prose narrative. It's held up as the standard for what separates real Product Strategy (evidence-backed, reasoned) from "wishful thinking" (strategy asserted without data or logic).
The six-page written narrative is Cagan's favorite output artifact for a Product Strategy specifically because it forces the data and reasoning behind a prioritization choice onto the page — not just the conclusion. That's what makes the strategy's bet transparent and checkable by others, rather than an assertion to take on faith.
Tamar Yehoshua (Glean, ex-Amazon) recalls the six-page memo requirement specifically as a replacement for PowerPoint decks, read silently at the top of a meeting before discussion. She pairs it with a related Bezos meeting habit: after the reading, he polls every team lead in the room for their view and states his own opinion last — see Speak Last: Bezos's Meeting-Opinion Sequencing.
Bezos replaced PowerPoint decks with narrative six-page memos, and the meeting ritual itself mattered as much as the document: attendees read the memo silently at the start of the meeting (rather than presenting it), which forced writers toward complete, linear argument instead of bullet fragments, and forced readers to actually engage with the full reasoning before discussion started.