Experimentation: A/B, Multivariate, and Guardrails
Before opening Optimizely or VWO, define the friction, audience, and expected lift. For activation, test onboarding clarity; for purchase, test risk removal. Share your hypothesis in a public doc so everyone understands the why.
Experimentation: A/B, Multivariate, and Guardrails
Use a sample size calculator, set a minimum detectable effect, and avoid peeking early. Always run sample ratio mismatch checks to catch broken randomization. Adopt sequential testing only if your team commits to its rules.