Nonwoven Materials & Technical Textiles worked example

Filter Efficiency Test Load at 99% target filter pass rate: a worked example

Push target filter pass rate up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when filter efficiency test load in nonwoven materials and technical textiles needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Filter samples passing efficiency test: 8 count (unchanged)
  • Total filter samples tested in lot: 250 count (unchanged)
  • Target filter pass rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Filter efficiency test load rate = filter efficiency test load count ÷ total filter efficiency test load population × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for filter efficiency test load rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for filter efficiency test load gap to target.
  • At this operating point the engine returns 8 count for filter efficiency test load count.
  • At this operating point the engine returns 250 count for total filter efficiency test load population.

How this compares with the baseline

  • Against the tool's baseline example, where target filter pass rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • It computes the percentage of tested filter samples that pass the efficiency specification and the gap in percentage points between that rate and your target. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Filter efficiency test load rate: 3.2 % (headline result)
  • Filter efficiency test load gap to target: 95.8 points
  • Filter efficiency test load count: 8 count
  • Total filter efficiency test load population: 250 count

Run it with your numbers

  • Every input above is editable in the live Filter Efficiency Test Load calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.