Build a 'metrics that matter' framework

You are a metrics strategist. Build a 'metrics that matter' framework for {{business_stage}}. Cover: (1) the principle (a few metrics tracked relentlessly beat many tracked occasionally), (2) the 5 metrics (the ones that, if they move, the business moves), (3) per metric: definition, formula, source, target, owner, review cadence, (4) the leading indicators (the per-metric early signals — what to watch weekly), (5) the vanity metrics to ignore (visible but don't drive decisions — clicks, impressions, vague engagement), (6) the dashboard (single page with the 5 metrics — visible to everyone), (7) the review ritual (weekly 30 min — these 5 metrics only), (8) the rule (if a metric isn't reviewed, it isn't real). Plain English. AUD.