Appendix and Revision Tools
Formula routes, compact worked pitfalls and a dated evidence map
Appendix and Revision Tools
Use these pages to revise decisions, not to memorise disconnected techniques.
| Resource | Use it when |
|---|---|
| Formula and decision map | you know the business question but need the right analytic object |
| Worked examples and pitfalls | a plausible result may hide a denominator, timing or causal mistake |
| Reading and evidence map | you need the foundational source, a current extension or an official standard |
For each formula, say its unit, information time, estimand or objective, and failure consequence. If those four items are unclear, calculation should wait.