New Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 4) which is identical with ISO 17450-4 : 2017 ‘Geometrical product specifications (GPS) - Basic concepts - Part 4: Geometrical characteristics for quantifying GPS deviations’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards after the draft finalized by Engineering Metrology Sectional Committee had been approved by the Production and General Engineering Division Council.

This standard has been issued in several parts. Other parts in this series are:

Part 1 Model for geometrical specification and verification

Part 2 Basic tenets, specifications, operators, uncertainties and ambiguities

Part 3 Toleranced features

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain 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 ‘Indian Standard’.

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