The playbook's two reference tables both did the same simplifying thing: G copies of one metric, same baseline, same variance, repeated. Real launches don't watch G copies of the same guardrail — they watch a handful of genuinely different ones, each with its own baseline and its own variance. This article works that case with real numbers: a payment rate, a payment amount, and an ad revenue metric, on their own and combined.
Three Real Guardrails
Payment rate at a 30% baseline. Payment amount with a coefficient of variation of 3. Ad revenue with a coefficient of variation of 2...