What makes a KPI
A KPI — key performance indicator — is a number chosen because it reflects something that matters and changes when you act. The skill is picking few: a wall of metrics is noise, while five well-chosen KPIs tell the story of the business.
A good KPI is comparable over time and tied to a decision. If a number never changes your behaviour, it is a statistic, not a KPI.
Beware the vanity metric — “total sales ever” or cumulative customers — which only ever rises and so can never tell you whether this month was good or bad. Prefer rates and ratios over running totals: sales per day, margin percent, stock turns. The test is simple — can the number go down as well as up in response to what you did? If not, it flatters rather than informs.
Key takeaways
- A KPI reflects what matters and moves when you act.
- Few well-chosen KPIs beat a wall of metrics.
- If a number never changes behaviour, it is not a KPI.
- Avoid ever-rising vanity totals — prefer rates and ratios that can move down as well as up.