ISO INTERNATIONAL STANDARD 20170 First edition 2019-04 Geometrical product specifications (GPS) Decomposition of geometrical characteristics for manufacturing control Spécification géométrique des produits (GPS) - Décomposition des caractéristiques geomeétriques pour la maitrise de la fabrication Reference number IS0 20170:2019(E) so @IS02019 IS0 20170:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 20170:2019(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Symbols. .3 5 Principles .3 5.1 General. .3 5.2 Decomposition process ..4 5.3 Determination of components of a collected characteristic. .12 5.4 Use of collected characteristics. ..13 5.5 Presentation of a GPS or a collected characteristic results. .14 5.5.1 General .14 5.5.2 Decomposition steps .15 Annex A (informative) Relationship to the ISo GPS matrix model ..19 Bibliography .20 @ IS0 2019 - All rights reserved iii