A metric can help until the metric becomes the whole job. Then the number starts running the behavior instead of simply measuring it.
The number starts running the behavior
The metric is not the outcome
Reading 50 books is a metric.
Understanding what you read is the outcome. Hitting 10,000 steps is a metric. Being well enough to live well is the outcome. The trouble starts when the proxy quietly replaces the point.
Named after economist Charles Goodhart in 1975: once a measure becomes the target, it stops behaving like a clean measure.
You can hit the number and miss the point
A watch can push you into pacing the room before midnight just to close a ring.
A writing app can push you toward volume instead of clarity. The number gets hit. The reason you were tracking it gets lost.
Quick check
Knowledge Check
What is the real failure in a Goodhart's Law situation?
Why:
- Metrics are useful until they become the entire job.
- Then you start serving the scoreboard instead of the thing the scoreboard was meant to track.
Try this
Hide one scoreboard for a week
Pick one area where the scoreboard is crowding out the real job: screen time, calories, steps, output, followers. Hide the dashboard for a week and focus on the behavior that matters without checking the number all day.
Key idea
What to remember
Metrics are feedback, not a boss. If the scoreboard starts running the day, hide it and go back to the real outcome.