The Cost of a Wrong Guardrail

A guardrail metric is a metric with the authority to stop a launch. That authority makes it the highest-stakes number a team defines, and most teams define it in a hurry.

This talk covers what happens when one is set too tight, too loose, or on a proxy: the launches blocked for nothing, and the one that should have been blocked and was not.

It closes with a short list of things worth protecting, and a longer list of things worth ignoring.