Is this the same as shot-peening coverage?

No. This is work-scope completion and accepted production rate. Shot-peening coverage is a surface condition evaluated with the applicable process standard.

Why cap accepted area at total scope?

Completion above 100% usually means overlapping measurements, duplicated area or a scope mismatch. The warning flags the discrepancy without publishing an impossible completion.

Which rate should I schedule with?

Use accepted area per active hour for remaining nozzle time, then divide by realistic utilization to forecast clock time.

Should rework count as complete?

Only after the reworked area passes the required inspection and is accepted at the job standard.

Abrasive Blasting, Shot Peening & Surface Prep calculator

Blast Coverage Completion and Production Rate Calculator

Check accepted coverage completion, the production rate behind it and how much of the elapsed window was active blasting. Enter scope area, accepted area, active and elapsed minutes, and the checkpoint target.

What this calculator does

Accepted coverage completion, production rate and active utilization, so schedule forecasts do not mix three different measures.

Formula used

Completion = accepted area ÷ total scope area × 100
Accepted rate = accepted area × 60 ÷ active blast minutes
Active utilization = active blast minutes ÷ elapsed minutes × 100
Variance = completion − target; remaining hours = remaining area ÷ accepted rate

Inputs explained

Total Scope Area: Net area required by the work package.
Accepted Completed Area: Area inspected and accepted at the required standard.
Active Blast Time: Nozzle-on minutes used to create the accepted area.
Elapsed Production Time: Clock minutes including loading, breaks, refills and delays.
Target Completion: Planned completion at this checkpoint.

How to use the result

Best suited to shift review, daily production forecast, contractor progress verification.
Completion percentage does not establish shot-peening coverage under SAE J2277. Access, geometry, coating condition and media wear can change the rate.

Common questions

Is this the same as shot-peening coverage? No. This is work-scope completion and accepted production rate. Shot-peening coverage is a surface condition evaluated with the applicable process standard.
Why cap accepted area at total scope? Completion above 100% usually means overlapping measurements, duplicated area or a scope mismatch. The warning flags the discrepancy without publishing an impossible completion.
Which rate should I schedule with? Use accepted area per active hour for remaining nozzle time, then divide by realistic utilization to forecast clock time.
Should rework count as complete? Only after the reworked area passes the required inspection and is accepted at the job standard.

Last reviewed 2026-10-01.