When you step into a fleet management role, whether you worked your way up from the shop floor or are new to the industry altogether, one of the first questions that tends to come up is: "What metrics should I actually be tracking?"

The truth is, not every organization will hand you a ready-made dashboard of KPIs. In fact, you might not even be asked to track anything at all. But as Nathan Schaefer, director at RTA Fleet (The Fleet Success Company), pointed out, there are a few foundational metrics every fleet manager should know and measure. They not only help you prove value but also keep your operation safe, reliable, and mission-ready.

Let’s break down three essential starting points:

1. Fleet Availability and Vehicle Downtime

Call it availability. Call it downtime. At the end of the day, it’s the same thing just viewed from opposite sides. Availability measures the percentage of your fleet's assets that are ready to go when needed.

If you’re running a trucking operation, that means trucks and trailers that are mission-ready to move freight. For a city fleet, it could mean patrol cars or snowplows that are roadworthy and available for dispatch. At its core, this metric reflects whether your fleet is actually able to deliver on its mission. 

And because everything else — maintenance, parts, shop efficiency — feeds into availability, it’s one of the clearest snapshots of overall fleet health.

2. Preventive Maintenance Compliance Rate

This one comes down to timing: Did you complete preventive maintenance on schedule? PM compliance goes far beyond checking a box. It directly impacts risk, costs, and efficiency. 

Skip or delay a PM, and you open the door to bigger, more expensive problems down the road. Missing a PM by just a couple of weeks could mean overlooking an issue that later causes a catastrophic breakdown. Staying on top of PMs helps keep assets reliable, protects your budget from surprise repairs, and gives your shop a more predictable workflow.

3. Scheduled vs. Unscheduled Repair Ratio

Think of this as the “predictability” metric. Are most of your repairs planned or unexpected? Unscheduled repairs not only drive up costs but also sideline vehicles when you least expect them, hurting availability and throwing operations off balance. 

Tracking the balance between scheduled and unscheduled work helps you identify patterns, reduce reactive maintenance, and shift your shop toward a more proactive and planned approach. In the long run, it’s a simple way to gauge both asset health and operational stability.

Honorable Mention: Fleet Utilization Rate

Utilization can be trickier to define, but it is still worth attention once you’ve covered the basics. It’s not just about miles driven or days in service.  A vehicle could travel only five miles a day, yet still be heavily used if it functions as a mobile office, such as a police cruiser. 

Examining how assets are actually being utilized (beyond odometer readings) provides context for replacement planning, right-sizing, and determining whether your fleet is being deployed effectively.

Now, Where Do Fleet Managers Actually Start?

To sum it up, if you’re new to metrics, Schaefer recommended beginning with three simple KPIs: 

• Availability (or downtime)

• PM compliance

• Scheduled versus unscheduled repairs

Once you start tracking these, you’ll uncover “feeder metrics,” such as parts availability, labor efficiency, or shop throughput, which influence those top-line numbers.

By focusing first on these core measures, you’ll build a strong foundation for smarter, data-driven fleet management. Start with the basics, and you’ll have the building blocks you need to prove value, reduce risk, and keep your fleet running strong.