IS 15393 : Part 4 : 2021/ISO 5725-4 : 2020 Accuracy ( Trueness and Precision ) of Measurement Methods and Results - Part 4 Basic Method for the Determination of Trueness of a Standard Measurement Method

Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 4) (First Revision) which is identical with ISO 5725-4 : 2020 ‘Accuracy (trueness and precision) of measurement methods and results — Part 4: Basic methods for the determination of the trueness of a standard measurement method’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendations of Statistical Methods for Quality and Reliability Sectional Committee and approval of the Management and Systems Division Council.

This standard was originally published in 2003 which was identical with ISO 5725-4 : 1994. This first revision of this standard has been undertaken to align it with latest version of ISO 5725-4 : 2020.

The major changes in this revision are as follows:

a) clearly recognizing the requirements of the accepted reference values used in bias evaluation experiments and introducing the uncertainties of the accepted reference values; and

b) changing examples with a currently used measurement method.

This Indian Standard is published in various parts. The other parts in this series are:

Part 1 General principles and definitions

Part 2 Basic method for the determination of repeatability and reproducibility of a standard measurement method

Part 3 Intermediate measures of the precision of a standard measurement method

Part 5 Alternative methods for the determination of the precision of a standard measurement method

Part 6 Use in practice of accuracy values

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘IndianStandard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimalmarker.