What this calculator does
This metric divides annual maintenance cost by the number of maintained assets. It produces a simple screening ratio, not a measure of maintenance effectiveness by itself.
When to use it
Use it for portfolio trend review, budget framing, or comparing similarly scoped asset groups over time.
Inputs and formula
Cost per asset = annual maintenance cost ÷ maintained asset count. Count active maintained assets consistently and state whether contractor, materials, and shutdown costs are included.
Worked example and interpretation
$240,000 across 120 maintained assets yields $2,000 per asset-year. A high value may reflect asset criticality or age rather than waste.
Practical notes and limitations
Do not compare a pump fleet with a full process train without stratification. Pair the ratio with downtime, backlog, and condition data.