Quality & Metrology calculator

Sigma Shift Calculator

Estimate sigma shift for quality & metrology using production inputs, allowances, and safe planning assumptions. Start with a value, subtract up to three deductions, and see what is left for quality and metrology planning.

What this calculator does

  • Estimate sigma shift for quality & metrology using production inputs, allowances, and safe planning assumptions.
  • Use it when sigma shift in quality and metrology is being planned and you need to net-out known deductions.
  • Turns starting sigma shift value, first sigma shift deduction, second sigma shift deduction into a remaining value for sigma shift in quality and metrology.

Formula used

  • Total sigma shift deductions = first sigma shift deduction + second sigma shift deduction + third sigma shift deduction
  • Remaining sigma shift value = starting sigma shift value - total deductions

Inputs explained

  • Starting sigma shift value: Enter the initial inventory, capacity, budget, material, time, demand, or quantity before deductions.
  • First sigma shift deduction: Enter the first known loss, usage, scrap, demand, downtime, or cost deduction.
  • Second sigma shift deduction: Enter the second deduction from the same planning window or source record.
  • Third sigma shift deduction: Enter any remaining deduction, or leave it at zero if not needed.

How to use the result

  • Use it when sigma shift in quality and metrology is being net-out planned.
  • Negative remainders are clamped at zero, which hides over-commit; check the deductions if the result lands at zero.

Common questions

  • Why use this sigma shift tool for quality and metrology? Estimate sigma shift for quality & metrology using production inputs, allowances, and safe planning assumptions. You get a remaining value you can defend before quoting, scheduling, or sign-off.
  • Which assumptions drive the remaining value? starting sigma shift value, first sigma shift deduction, second sigma shift deduction usually move the remaining value most. Pull from measured quality and metrology runs, supplier data, and recent quotes rather than memory.
  • What do I do with this number? Use the remaining value as the planning amount for the next quality and metrology step.
  • What should I verify first? Confirm no deduction is being double-counted across systems.

Last reviewed 2026-05-12.