Key Performance Indicator (KPI)
A small number of measures a fleet manages by, chosen because they change what somebody does. Most fleets report many more numbers than they actually use.
A key performance indicator is a measure selected to drive a decision. The word doing the work is key: a fleet can produce hundreds of numbers, and a report carrying forty of them is not a scorecard, it is an archive.
The test worth applying to any candidate is simple. If this number moved, what would somebody do differently? A measure with no answer to that is worth collecting and not worth reporting. Cost per mile without a utilization figure beside it prompts the wrong action. PM compliance without a road call rate says the services happened, not that they helped.
Public fleets have a second audience commercial fleets do not, and it changes the selection. Some KPIs exist to run the shop and some exist to survive a budget hearing, and they are rarely the same numbers. Wrench time and fill rate manage the operation; availability, cost recovery and the replacement backlog are what a council or a finance director actually responds to. Reporting the first set upward tends to produce polite incomprehension.
The other durable rule is that a measure has to carry its definition with it. Availability, downtime and compliance all mean several different things depending on what starts the clock and what counts as on time, so a KPI reported without its definition invites a comparison that is not valid.
