Tunnel Boring & Heavy Civil Equipment worked example

Steel Plate Yield at 68% target plate acceptance rate: a worked example in tunnel boring & heavy civil equipment

This worked example runs the steel plate yield numbers for a tougher week than the baseline: 68% target plate acceptance rate instead of the typical 95%. Estimate steel plate yield for tunnel boring and heavy civil equipment using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.

The inputs for this scenario

  • Steel plates rejected at inspection: 8 count (held at the documented default)
  • Total steel plates fabricated: 250 count (held at the documented default)
  • Target plate acceptance rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Steel plate yield rate = steel plate yield count ÷ total steel plate yield population × 100.
  • Steel plate yield rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Steel plate yield gap to target works out to 64.8 points at these inputs.
  • Steel plate yield count works out to 8 count at these inputs.
  • Total steel plate yield population works out to 250 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target plate acceptance rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it per fabrication batch or per shift to monitor plate quality feeding heavy-civil sub-assemblies and shield structures. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Steel plate yield rate: 3.2 % (headline result)
  • Steel plate yield gap to target: 64.8 points
  • Steel plate yield count: 8 count
  • Total steel plate yield population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Steel Plate Yield calculator, set target plate acceptance rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.