How do you calculate condition monitoring coverage?

Divide the number of critical assets with active condition monitoring by your total critical assets, then multiply by 100. With 45 monitored out of 60 critical assets, that is 45 ÷ 60 × 100 = 75%.

What is a good condition monitoring coverage percentage?

For top-tier reliability programs, 90-100% coverage of designated critical assets is the goal. At 75% you are leaving a quarter of your most important machines on effectively run-to-failure, a 15-point gap to a typical 90% target.

What counts as a critical asset for condition monitoring?

An asset whose unplanned failure causes safety, environmental, production-stopping, or high-cost consequences — typically ranked via a criticality analysis. Only those assets belong in the denominator here, not every motor on site.

Does monitoring coverage mean the asset is protected?

No. Coverage only confirms sensors are active and reporting. Protection also requires correct alarm thresholds, someone reviewing the data, and a work order triggered when an anomaly appears.

How is coverage different from monitoring uptime?

Coverage is breadth — how many critical assets have sensing. Uptime is availability — what fraction of time those sensors are actually transmitting. You can have 75% coverage with poor uptime on the sensors you do have.

How do I close a coverage gap to target?

With a 15-point gap on 60 critical assets, you need active CM on about 9 more assets (90% × 60 = 54; 54 − 45 = 9). Prioritize by criticality ranking and current failure history.

IIoT, SCADA & Edge Connectivity calculator

Condition Monitoring Coverage Calculator

Condition monitoring coverage tells you what share of your critical, failure-prone assets actually have live vibration, thermal, oil, or current-signature sensing feeding a CM system. Reliability engineers and maintenance managers use it to expose blind spots — the pumps, gearboxes, and motors that can still fail unannounced because nobody is watching them. It matters because predictive maintenance programs only pay off across the assets they instrument; an uninstrumented critical asset defaults to run-to-failure no matter how mature your analytics are. Tracking coverage against a target turns a vague 'we do condition monitoring' into a measurable rollout you can fund and report.

What this calculator does

Estimate the share of critical assets with active condition monitoring (vibration, temperature, current, oil) from the count of critical assets monitored against the total critical assets in the criticality register, against the program target.
Use it when a reliability lead is reporting condition monitoring deployment progress against a criticality-based target on the reliability dashboard.
It computes the percentage of your designated critical assets that have active condition monitoring and the point gap between that coverage and your target.

Formula used

Condition monitoring coverage = monitored critical assets ÷ total critical assets × 100
Coverage gap to target = target coverage - actual coverage

Inputs explained

Critical assets with active condition monitoring:
Total critical assets:
Condition monitoring coverage target:

How to use the result

Use it when scoping a CM rollout, reporting reliability program maturity, or justifying budget to instrument the remaining uncovered critical assets.
Coverage counts whether sensing exists, not whether the data is actually reviewed, alarmed correctly, or acted on — full coverage with ignored alerts still lets assets fail.

Current U.S. benchmarks

Global copper trades at $13,484 per tonne (IMF via FRED, May 2026), up 41.5% in a year, and U.S. industrial electricity averages 8.66 cents per kWh. Both feed electrified-hardware unit economics.

Common questions

How do you calculate condition monitoring coverage? Divide the number of critical assets with active condition monitoring by your total critical assets, then multiply by 100. With 45 monitored out of 60 critical assets, that is 45 ÷ 60 × 100 = 75%.
What is a good condition monitoring coverage percentage? For top-tier reliability programs, 90-100% coverage of designated critical assets is the goal. At 75% you are leaving a quarter of your most important machines on effectively run-to-failure, a 15-point gap to a typical 90% target.
What counts as a critical asset for condition monitoring? An asset whose unplanned failure causes safety, environmental, production-stopping, or high-cost consequences — typically ranked via a criticality analysis. Only those assets belong in the denominator here, not every motor on site.
Does monitoring coverage mean the asset is protected? No. Coverage only confirms sensors are active and reporting. Protection also requires correct alarm thresholds, someone reviewing the data, and a work order triggered when an anomaly appears.
How is coverage different from monitoring uptime? Coverage is breadth — how many critical assets have sensing. Uptime is availability — what fraction of time those sensors are actually transmitting. You can have 75% coverage with poor uptime on the sensors you do have.

Last reviewed 2026-05-12.