Machine Vision & Industrial Inspection AI worked example

Vision Rework Reduction at 86% rework prevention effectiveness: a worked example

What does the result look like when rework prevention effectiveness reaches 86%? The full calculation is worked below with real intermediate numbers. Use it when building the rework savings portion of a machine vision business case and you need to quantify how much catching defects earlier in the process saves in rework labor each month.

The inputs for this scenario

  • Monthly rework volume prevented by the vision system: 280 parts / month (unchanged)
  • Rework cost avoided per part: 22.5 $ / part (unchanged)
  • Rework prevention effectiveness (share actually caught): 86 % (raised for this scenario; the documented default is 75)
  • Fixed monthly rework-operations overhead removed: 650 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable rework savings = rework volume prevented x rework cost per part x prevention effectiveness) to the inputs above produces each figure below.
  • At this operating point the engine returns 6,068 $ for total monthly rework savings, the number this scenario is built around.
  • At this operating point the engine returns 21.67 $ / piece for rework savings per inspected part.
  • At this operating point the engine returns 5,418 $ for variable rework savings.
  • At this operating point the engine returns 650 $ for fixed overhead reduction.

How this compares with the baseline

  • Against the tool's baseline example, where rework prevention effectiveness sits at 75% and the headline result is 5,375 $, this scenario comes in 12.89% above the baseline at 6,068 $.
  • A figure at this level is achievable when rework prevention effectiveness is genuinely sustained, not just peaked for a shift. It captures rework savings only, not scrap avoided, throughput gains, or warranty/escape costs, so it understates total value if those are material.

Results at a glance

  • Total monthly rework savings: 6,068 $ (headline result)
  • Rework savings per inspected part: 21.67 $ / piece
  • Variable rework savings: 5,418 $
  • Fixed overhead reduction: 650 $

Run it with your numbers

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

Last reviewed 2026-05-12.