You cannot manage what you do not measure. In 2026, maintenance teams operating without clear KPIs are essentially working without visibility, making it difficult to demonstrate value, justify budgets, or identify improvement opportunities that deliver the highest return.

1. Mean Time Between Failures (MTBF)

MTBF measures the average time between equipment failures over a specific period. A rising MTBF indicates that your preventive maintenance programme is performing effectively, allowing assets to operate longer between breakdowns. A declining MTBF is often an early warning sign that maintenance strategies, operating conditions, or asset health are beginning to deteriorate. Tracking MTBF by asset category helps identify which equipment requires the most attention.

2. Mean Time to Repair (MTTR)

MTTR measures how quickly maintenance teams can restore equipment to operational condition after a failure. This metric reflects not only technical skill, but also process efficiency and preparation. High MTTR values often indicate issues such as limited parts availability, unclear repair procedures, or insufficient technician training. Reducing MTTR starts with analysing the longest repair incidents and identifying recurring bottlenecks.

Reducing MTTR by 20% can deliver the same production impact as reducing failure frequency by 20%, because both directly improve equipment availability.

3. Overall Equipment Effectiveness (OEE)

OEE is considered the gold standard maintenance KPI because it combines availability, performance rate, and quality rate into a single measurement of asset effectiveness. An OEE score above 85% is considered world class. Most facilities operate within the 60% to 65% range, leaving substantial production capacity unused. Maintenance teams directly influence the availability component, making it one of the most important areas for improvement.

4. Planned Maintenance Percentage (PMP)

PMP measures the percentage of total maintenance hours dedicated to planned work instead of reactive repairs. A high PMP, typically above 80%, indicates that maintenance teams are operating proactively rather than constantly responding to unexpected breakdowns. Monitoring PMP over time helps determine whether preventive maintenance strategies are genuinely reducing reactive workload or simply increasing total maintenance activity.

5. Maintenance Cost as a Percentage of Asset Replacement Value (MARC)

This financial KPI provides important business context that operational metrics alone cannot deliver. Measuring maintenance spend as a percentage of asset replacement value allows organisations to benchmark against industry standards, typically between 2% and 5%. Rising MARC values may indicate that assets are aging beyond their most cost effective service life, supporting stronger business cases for capital investment.

  • MTBF: Target annual improvements of 10% to 15% for high criticality assets
  • MTTR: Aim to reduce current averages by 25% within 12 months through better processes and parts availability
  • OEE: Set realistic improvement goals, such as increasing from 65% to 72% within the first year
  • PMP: Work toward achieving more than 80% planned maintenance within two years
  • MARC: Benchmark annually and identify assets where maintenance spend exceeds 4% of replacement value