Maintenance & Reliability worked example

Equipment Availability at 99% performance factor: a worked example

What does the result look like when performance factor reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when an asset is mechanically available but still missing output because speed or quality losses matter.

The inputs for this scenario

  • Runtime hours: 680 hr (unchanged)
  • Planned production hours: 720 hr (unchanged)
  • Performance factor: 99 % (raised for this scenario; the documented default is 96)
  • Quality factor: 99 % (unchanged)

Working through the calculation

  • Applying the documented formula (Base availability = runtime hours ÷ planned production hours × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 92.57 % for effective equipment availability, the number this scenario is built around.
  • At this operating point the engine returns 94.44 % for base uptime.
  • At this operating point the engine returns 99 % for performance factor.
  • At this operating point the engine returns 99 % for quality factor.

How this compares with the baseline

  • Against the tool's baseline example, where performance factor sits at 96% and the headline result is 89.76 %, this scenario comes in 3.13% above the baseline at 92.57 %.
  • A figure at this level is achievable when performance factor is genuinely sustained, not just peaked for a shift. Folding performance and quality into availability blends three OEE pillars; for strict OEE breakdowns keep them separate and use base uptime alone for the availability pillar.

Results at a glance

  • Effective Equipment Availability: 92.57 % (headline result)
  • Base Uptime: 94.44 %
  • Performance Factor: 99 %
  • Quality Factor: 99 %

Run it with your numbers

  • Every input above is editable in the live Equipment Availability calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.