Goodhart's law is an adage named after economist Charles Goodhart, which has been phrased by Marilyn Strathern as "When a measure becomes a target, it ceases to be a good measure." One way in which this can occur is in an individual or organization trying to anticipate the effect of a policy or and then taking actions that alter its anticipated outcome.
When one distorts decisions to improve the performance measure, they surrogate—developing a 📝Cognitive Bias and believing the measure is a better measure of true performance than it is. [1]
Related to 📝Campbell's Law and 📝Surrogation, Goodhart warns us about the unintended consequences of confusing the metrics we choose with our overarching end goals. The more we rely solely on what can be measured, we lose touch with the importance of 📝quality.