Check That No Stand-In Did a User’s Step

The Shortest Truthful Distance

Companion to You Are Not the User · Updated 2026-09-29

Use this when you want to check that a piece of product work went through the whole loop without a stand-in doing a user’s step. Worked in “A Fast Loop Only Works if Real Users Stay in It.”

The Shortest Truthful Distance loop check for one piece of work.

StepWho did itOutputReal user present where the step needs one?
User
Observation
Evidence
Prototype
Real-user validation
Engineering hardening
Production measurement

User, real-user validation, and production measurement can’t be done without real users. If any of those three rows names only internal staff, the work isn’t finished; it’s waiting at that step.