Metrology toolbox · decision quality

Make the acceptance rule visible.

Calculate TUR, TAR, guard bands, conformity classifications, and tolerance consumption without hiding the assumptions behind a single pass/fail label.

Decision workspace

Conformity, ratios, and tolerance

Evaluate one result with an explicit rule. Values update immediately and are not stored. Display rounding does not determine conformity.

Free · local calculation

Specification type

Decision rule

Measured value

Lower limit

Upper limit

Expanded uncertainty (±U)

Reference standard specification (±)

Tolerance check

Nominal and asymmetric limits

Nominal

Lower tolerance (−)

Upper tolerance (+)

Tolerance utilization60%Within tolerance

Method references

Use the applicable customer, accreditation, or regulatory decision rule when it differs from these selectable models.

JCGM 106:2012 — Conformity assessment ILAC G8:09/2019 — Decision rules NIST — 4:1 Test Uncertainty Ratio