Design, power, run, and analyze statistically valid A/B/N product experiments (sample size, duration, SRM, sequential monitoring, multiple comparisons). Use when pre-registering a test or reading out a controlled split. Not for event instrumentation, funnel diagnosis, wandb ML tracking (weights-and-biases), MVP smoke tests (mvp-scoping-and-risk-test), or RICE scoring (feature-prioritization-frameworks).
