Test what matters
How to Write a Prototype Test Plan That Produces a Decision
Define the configuration, method, acceptance rule, observations, and decision before testing your invention prototype.
4 min readTest what matters
Practical guides for independent inventors. Start with the question closest to your next decision.
Test what matters
How to Compare Two Prototype Designs Without Confounding the Result
Design a fair prototype comparison with controlled conditions, repeat observations, order effects, and explicit treatment of interacting changes.
4 min read
Test what matters
How to Keep a Prototype Failure Log That Leads to a Fix
Capture failures before changing the prototype, distinguish observation from hypothesis, and verify corrections against the original failure.
4 min read
Test what matters
What Zero Failures in a Small Prototype Test Really Means
Interpret a small successful test without claiming perfect reliability, and distinguish repeated cycles from independent product samples.
4 min read
Test what matters
Why Your Prototype Measurements Keep Changing
Separate part variation from measurement variation with a defined method, repeated readings, operator checks, and appropriate instruments.
4 min readPrepared by Inventor Underground. Examples are illustrative unless a source says otherwise. How these guides are prepared ยท Send a correction