Fire Suppression, Sprinkler & Safety System Products worked example

Inspection Sample Size at 98% inspection station uptime: a worked example in fire suppression, sprinkler & safety system products

This scenario runs the inspection sample size calculation on the strong side: 98% inspection station uptime, with every other input held at its documented default. Use it when planning QA sample inspections for sprinkler heads, valves, cylinders, alarms, detectors, extinguishers, brackets, or safety-system kits.

The inputs for this scenario

  • Samples inspected per cycle: 10 samples / cycle (unchanged)
  • Available inspection cycles: 48 cycles (unchanged)
  • Inspection station uptime: 98 % (raised for this scenario; the documented default is 85)
  • Accepted inspection record yield: 98 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross inspection sample size = samples inspected per cycle × available inspection cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 461 units for good output capacity, the number this scenario is built around.
  • At this operating point the engine returns 480 units for gross capacity before uptime and yield.
  • At this operating point the engine returns 9.6 units for availability loss.
  • At this operating point the engine returns 9.41 units for reject or rework allowance.

How this compares with the baseline

  • Against the tool's baseline example, where inspection station uptime sits at 85% and the headline result is 400 units, this scenario comes in 15.29% above the baseline at 461 units.
  • Use it when planning inspection throughput for a fire protection component lot, sizing a QC shift, or checking whether one station can clear incoming volume. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Good output capacity: 461 units (headline result)
  • Gross capacity before uptime and yield: 480 units
  • Availability loss: 9.6 units
  • Reject or rework allowance: 9.41 units

Run it with your numbers

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

Last reviewed 2026-05-12.