Electronics Manufacturing calculator

Component Attrition Calculator

Component attrition captures feeder drops, tombstoning losses, setup scrap, MSD expiration, damaged packages, and cycle-count variances. This calculator helps materials and SMT teams compare actual attrition with target assumptions.

What this calculator does

  • Measure component attrition percentage from lost, scrapped, or consumed extra parts versus total issued parts.
  • a materials planner is checking whether component attrition is eroding kit accuracy or quote margin
  • Returns the component attrition value for the selected electronics manufacturing scope.

Formula used

  • Component attrition rate = attrited or lost components รท total components issued
  • Attrition gap to target = target component attrition - component attrition rate

Inputs explained

  • Attrited or lost components: Use a current, same-scope value for attrited or lost components from the traveler, MES, ERP, test log, quote, or validated engineering estimate.
  • Total components issued: Use a current, same-scope value for total components issued from the traveler, MES, ERP, test log, quote, or validated engineering estimate.
  • Target component attrition: Use a current, same-scope value for target component attrition from the traveler, MES, ERP, test log, quote, or validated engineering estimate.

How to use the result

  • Use it when production, quality, test, procurement, or estimating teams need a defensible number before schedule or quote decisions.
  • It is an estimate and does not replace detailed routing, validated test programs, supplier DFM feedback, thermal profiling, capability studies, or yield-analysis models.

Common questions

  • What does the component attrition calculator tell me? It gives a component attrition result using electronics, PCB, or semiconductor production inputs that match the same lot, board family, wafer lot, or shift.
  • Which numbers should I enter? Use current values from CAD/CAM, BOM, MES, test logs, supplier quotes, or process records; keep the count, time, yield, and cost basis consistent.
  • How should I use the result? Use the result to support capacity checks, quote rollups, yield reviews, staffing decisions, material planning, or process-improvement priorities.
  • When is this only an estimate? Treat it as a planning estimate when product mix, setup time, operator assist time, feeder readiness, inspection disposition, test escapes, scrap, or supplier yield differs from the data used for the inputs.

Last reviewed 2026-05-12.