Core insight: most slow or risky decisions fail because teams try to do too much in one step. The Execution Aperture reframes every choice as a hypothesis that should be proved or disproved by the smallest possible deployable unit (SDU): a time‑boxed, scope‑limited experiment with clear success metrics and an automatic rollback. This episode gives three operational moves you can use immediately: a one‑line SDU template (what you change, for whom, metric, timebox, rollback), a risk budget rule to cap downstream exposure, and two AI patterns that draft an SDU from a decision note and produce a one‑line monitoring probe. You'll get a 7‑day pilot script to shift one current decision into an SDU, exact copy‑paste wording to assign owners and monitoring, and one immediate action: pick an active decision and define its SDU before the day ends. CTA: subscribe. Stay agentic.