https://decisionsengineer.com/the-assumption-nobody-wrote-down-why-single-number-plans-break/2026-04-13T12:12:32.000Zhttps://storage.ghost.io/c/8c/56/8c560ae0-6678-4933-afb8-a2f2e50f4fd6/content/images/2026/04/2026-04-13---The-Assumption-Nobody-Wrote-Down-featured-image-1.png2026-04-13---The-Assumption-Nobody-Wrote-Down-featured-image-1.png