Plain definition
A key performance indicator, or KPI, is a selected measure that shows whether a critical business objective or driver is moving in the required direction. A KPI is not simply any number that is easy to collect; it needs a decision use, a clear definition, and an owner.
Illustrative example
A subscription business treats monthly customer renewals as a KPI because renewal rate affects future revenue and acquisition spending. In June, 90 of 120 eligible customers renew, giving a 75% rate. The target is 85%, so the customer-success leader reviews the 30 non-renewals and finds that 18 relate to a delayed product feature. The company decides whether to accelerate the feature or change the renewal offer.
| Renewed customers | |
|---|---|
| Eligible customers | |
| Renewal rate factor |
A KPI can be financial or operational. Its importance comes from its link to a stated objective, not from its label.
Why it matters
Teams can improve a visible number that has little bearing on the company’s outcome. A carefully chosen KPI connects daily work with the decision that senior management actually needs to make.
Practical consequence
Write the objective, calculation, population, period, source, target rationale, owner, and action when the measure misses. Review the KPI with its supporting measures so a rate cannot be improved by excluding difficult cases. Retire indicators that no longer affect a decision; a long list of “key” numbers makes none of them key.