GB/T 27430-2022Role of measurement uncertainty in conformity assessment (English PDF)

1 Scope

This document provides guidance and procedures for evaluating the conformity of an article (entity, object or system) with the requirements of the specification. The item can be (Example) Gauge blocks, grocery scales, or blood samples. The following procedures can be used in the following situations.

a) The item under test is distinguished by a single scalar quantity (measurable property, see 3.2.1) defined by a detailed procedure sufficient to

A truth-value representation;

Note. GB/T 27418-2017 provides reasons for not using the term "true", but this document will still use this term, otherwise there may be ambiguity or confusing situation.

b) the permissible value interval for the attribute is bounded by one or two tolerance limits;

c) The attribute can be measured, and the measurement results (see 3.2.5) are expressed in the manner in GB/T 27418-2017, so that the attribute

Knowledge of values can be achieved through.

1) Probability density function (PDF, see 3.1.3);

2) distribution function (see 3.1.2);

3) Numerical approximations of these functions;

4) Reasonably described with the inclusion interval and the best estimated value of the corresponding inclusion probability.

The procedures presented in this document are applied to yield intervals of allowable measured values for the attribute of interest, called acceptance intervals. may reasonably choose to accept

Limits effectively balance the risk of accepting nonconforming items (consumer risk) or rejecting conforming items (producer risk).

This document addresses two conformity assessment issues. The first is to set the acceptance limit to ensure that the expected pass probability of a single tested item is achieved; the second

The second is to set acceptance limits to ensure that multiple items (of the same nominal name) are measured with an acceptable average confidence level. This document provides solutions to guide.

This document contains examples to illustrate the above guidelines. The concepts presented in this paper can be extended to more measurands based on measuring a set of scalar

Common conformity assessment questions. Some documents, such as Refs. [13,19], cover industry-specific conformity assessment issues.

This document is applicable to quality managers, members of standards development organizations and accreditation bodies, as well as testing and calibration laboratories, inspection bodies, certification bodies

It is used as a reference by personnel of institutions, regulatory authorities, colleges and research institutes.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 3358.1-2009 Statistical vocabulary and symbols - Part 1.General statistical terms and terms used in probability (ISO 3534-1.

2006, IDT)

GB/T 3358.2-2009 Statistics Vocabulary and Symbols Part 2.Applied Statistics (ISO 3534-2.2006, IDT)

GB/T 27000-2006 Conformity Assessment Vocabulary and General Principles (ISO /IEC 17000.2004, IDT)

GB/T 27418-2017 Evaluation and Expression of Measurement Uncertainty

GB/T 27419-2018 Measurement Uncertainty Assessment and Representation Supplementary Document 1.Distribution Propagation Based on Monte Carlo Method

ISO /IEC Guide99.2007 Basic and common concepts and related terms of international metrology vocabulary [International

JJF 1800 | JJF 1835 | JJF 1059.1 | GB/T 45434.1 | GB/T 43735 | […]