Abrasive Blasting, Shot Peening & Surface Prep worked example

Blast Coverage Completion Rate at 92% target completion for this checkpoint: a worked example

What does the result look like when target completion for this checkpoint reaches 92%? The full calculation is worked below with real intermediate numbers. a blasting crew needs a quick percent-complete number from measured square footage instead of a rough visual guess

The inputs for this scenario

  • Surface area blasted so far: 1,800 sq ft (unchanged)
  • Total area planned to blast: 2,400 sq ft (unchanged)
  • Target completion for this checkpoint: 92 % (raised for this scenario; the documented default is 80)

Working through the calculation

  • Applying the documented formula (Coverage completion = blasted area completed รท total planned blast area) to the inputs above produces each figure below.
  • At this operating point the engine returns 75 % for coverage completion, the number this scenario is built around.
  • At this operating point the engine returns 17 points for gap to target.
  • At this operating point the engine returns 1,800 sq ft for completed area.
  • At this operating point the engine returns 2,400 sq ft for planned area.

How this compares with the baseline

  • Against the tool's baseline example, where target completion for this checkpoint sits at 80% and the headline result is 75 %, this scenario lands almost exactly on the baseline at 75 %.
  • A figure at this level is achievable when target completion for this checkpoint is genuinely sustained, not just peaked for a shift. Square feet completed does not capture quality; area can be blasted but still fail a profile or cleanliness check on inspection.

Results at a glance

  • Coverage completion: 75 % (headline result)
  • Gap to target: 17 points
  • Completed area: 1,800 sq ft
  • Planned area: 2,400 sq ft

Run it with your numbers

  • Every input above is editable in the live Blast Coverage Completion Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.