Guard Banding Decision Rule Tool

M&Q Engineering • ILAC-G8 / ISO/IEC 17025 Decision Rule Screening • Tolerance / Uncertainty / Acceptance Zone

Part / Feature Reference

Nominal Dimension

Upper Tol (+)

Lower Tol (-)

Uncertainty Profile

Decision Rule

Measured Value

Assessment Notes

Guard banding applies a decision rule to reduce the risk of false acceptance where measurement uncertainty is significant relative to tolerance. Use as a decision-support aid; final conformity decisions should follow authorised quality, laboratory and customer-specific procedures.

Feature Ref	Nominal	Spec Min	Spec Max	Safe Min	Safe Max	U	Decision	Action
No guard banding decisions added

Safe Upper Limit

10.0480

Guard-banded upper acceptance limit

Safe Lower Limit

9.9820

Guard-banded lower acceptance limit

Conformity Decision

Measured value is inside the acceptance zone

Tolerance Utilisation Gauge

LOW DECISION RISK

Current Decision Basis

U 0.0020 | Stringent

Guard band and decision rule basis

Audit Status: No calculation recorded.