Experiment Brief: Align Before You Build

Most experiments fail before they ship — not because the idea was bad, but because PM, engineering, and data science weren't aligned on what was being tested, why it mattered, and how to measure it. This template is built on Adam Fishman's approach at Patreon: a single shared experiment doc that replaces three Slack threads and a last-minute meeting. It captures problem statement, hypothesis, measurement plan, and rollout criteria before development starts — so disagreements surface in a doc, not a post-mortem. Inside you'll get a proposals workbook with 18 sample experiments across the full lifecycle, a Kanban board to track pipeline from Proposal through Concluded, and a calendar view to detect experiment overlap before it contaminates results. The primary task walks a PM from rough idea to DS-reviewed proposal in 8 structured steps — including a guardrail metric check that most teams skip until it's too late. Built for Growth PMs, growth leads, and experimentation teams at Series B–C companies who run cross-functional experiments and need alignment before the sprint starts.