ISO INTERNATIONAL STANDARD 17450-1 First edition 2011-12-15 Geometrical product specifications (GPS) General concepts Part 1: Model for geometrical specification and verification Spécification géométrique des produits - Concepts généraux - Partie 1: Modele pour la spécification et la verification géometriques Reference number ISO 17450-1:2011(E) @ ISO 2011 py IHS under ted without license from IHS Not for Resale ISO 17450-1:2011(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO2011 IsO's memberbody in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IsO 2011-All rights reserved etworking permitted without license from IHS Not for Resale ISO 17450-1:2011(E) Contents Page Foreword Introduction 1 Scope 2 Normative references.. 3 Terms and definitions 4 Application and future prospects 11 5 General 11 6 Features. 6.1 General.. .12 6.2 Ideal features 13 6.3 Non-idealfeatures 6.4 Relationships between geometrical feature terms... .16 L Characteristics .18 7.1 General .. 18 7.2 Intrinsiccharacteristicsofidealfeatures 18 7.3 Situation characteristics between ideal features. 19 7.4 Situation characteristics between non-ideal and ideal features .20 8 Operations. 21 8.1 Feature operations 21 8.2 Evaluation ... .25 8.3 Transformation .26 9 Specification .26 9.1 General.. .26 9.2 Specificationbydimension.. .26 9.3 Specification by zone..... 9.4 Deviation... .27 10 Verification .28 Annex A (informative) Examples of applications to Iso 1101... Annex B (informative) Mathematical symbols and definitions. .43 Annex C (informative) Comparison between tolerancing and metrology. ...55 Annex D (informative) Concept diagram for characteristics .. AnnexE(informative)Invarianceclasses.. Annex F (informative) Relationship to the GPS matrix model. ..60 Bibliography.. ..62 Alphabeticalindex ..63 Copyright International Organization for Standardizalon ghts reserved ii Not for Resale