EN ISO 17450-2:2012

SLOVENSKI STANDARD
01-julij-2013
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Geometrical product specifications (GPS) - General concepts - Part 2: Basic tenets,
specifications, operators and uncertainties (ISO 17450-2:2012)
Geometrische Produktspezifikation und -prüfung (GPS) - Allgemeine Begriffe - Teil 2:
Grundlegende Lehrsätze, Spezifikationen, Operatoren und Unsicherheiten (ISO 17450-
2:2012)
Spécification géométrique des produits (GPS) - Concepts généraux - Partie 2: Principes
de base, spécifications, opérateurs et incertitudes (ISO 17450-2:2012)
Ta slovenski standard je istoveten z: EN ISO 17450-2:2012
ICS:
17.040.40 6SHFLILNDFLMDJHRPHWULMVNLK Geometrical Product
YHOLþLQL]GHOND*36 Specification (GPS)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 17450-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2012
ICS 17.040.01
English Version
Geometrical product specifications (GPS) - General concepts -
Part 2: Basic tenets, specifications, operators, uncertainties and
ambiguities (ISO 17450-2:2012)
Spécification géométrique des produits (GPS) - Concepts Geometrische Produktspezifikation und -prüfung (GPS) -
généraux - Partie 2: Principes de base, spécifications, Allgemeine Begriffe - Teil 2: Grundlegende Lehrsätze,
opérateurs, incertitudes et ambiguïtés (ISO 17450-2:2012) Spezifikationen, Operatoren, Unsicherheiten und
Mehrdeutigkeiten (ISO 17450-2:2012)
This European Standard was approved by CEN on 15 September 2012.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
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COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17450-2:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 17450-2:2012) has been prepared by Technical Committee ISO/TC 213 "Dimensional
and geometrical product specifications and verification" in collaboration with Technical Committee
CEN/TC 290 “Dimensional and geometrical product specification and verification” the secretariat of which is
held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the
latest by April 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 17450-2:2012 has been approved by CEN as a EN ISO 17450-2:2012 without any
modification.
INTERNATIONAL ISO
STANDARD 17450-2
First edition
2012-10-01
Geometrical product specifications
(GPS) — General concepts —
Part 2:
Basic tenets, specifications, operators,
uncertainties and ambiguities
Spécification géométrique des produits (GPS) — Concepts
généraux — Partie 2: Principes de base, spécifications, opérateurs,
incertitudes et ambiguïtés
Reference number
ISO 17450-2:2012(E)
©
ISO 2012
ISO 17450-2:2012(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
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Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 17450-2:2012(E)
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Terms related to operations . 2
3.2 Terms related to operators . 3
3.3 Terms related to uncertainty . 7
3.4 Terms related to specifications . 9
4 Basic tenets . 11
5 Impact of uncertainty on basic tenets . 11
5.1 Impact of ambiguity of the description of the function and ambiguity of specification . 11
5.2 Impact of method and implementation uncertainties .12
6 Specification process .12
7 Verification process .13
Annex A (informative) Concept diagram.14
Annex B (informative) Drawing indications .15
Annex C (informative) Relationship to the GPS matrix model .16
Bibliography .18
ISO 17450-2:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 17450-2 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product
specifications and verification.
This first edition of ISO 17450-2 cancels and replaces ISO/TS 17450-2:2002, which has been technically
revised. It also incorporates ISO/TS 17450-2/Cor.1:2004.
ISO 17450 consists of the following parts, under the general title Geometrical product specifications (GPS) —
General concepts:
— Part 1: Model for geometrical specification and verification
— Part 2: Basic tenets, specifications, operators, uncertainties and ambiguities
iv © ISO 2012 – All rights reserved

ISO 17450-2:2012(E)
Introduction
This part of ISO 17450 is a Geometrical Product Specifications (GPS) standard and is to be regarded as a global
GPS standard (see ISO/TR 14638). It influences all chain links in all chains of standards in the general GPS matrix.
The ISO/GPS Masterplan given in ISO/TR 14638 gives an overview of the ISO/GPS system of which this
document is a part. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and the
default decision rules given in ISO 14253-1 apply to specifications made in accordance with this document,
unless otherwise indicated.
For more detailed information on the relationship of this part of ISO 17450 to other standards and to the GPS
matrix model, see Annex C.
This part of ISO 17450 covers several fundamental issues common to all the GPS standards developed by
ISO/TC 213 and, by presenting GPS’s basic tenets and specification and verification processes, explains some
of the underlying ideas and indicates the starting point for the standards developed by this technical committee.
It is pointed out that these ideas — and, for that matter, all the other ideas and concepts applied by ISO/TC 213
— are subject to development and refinement, as the TC’s recognition and understanding of them further
evolves during its ongoing standards work.
INTERNATIONAL STANDARD ISO 17450-2:2012(E)
Geometrical product specifications (GPS) — General concepts —
Part 2:
Basic tenets, specifications, operators, uncertainties and
ambiguities
1 Scope
This part of ISO 17450 defines terms related to specifications, operators (and operations) and uncertainties
used in geometrical product specifications (GPS) standards. It presents the basic tenets of the GPS philosophy
while discussing the impact of uncertainty on those tenets, and examines the processes of specification and
verification as they apply to GPS.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
ISO 14253-2:2011, Geometrical product specifications (GPS) — Inspection by measurement of workpieces
and measuring equipment — Part 2: Guidance for the estimation of uncertainty in GPS measurement, in
calibration of measuring equipment and in product verification
ISO 14660-1:1999, Geometrical Product Specifications (GPS) — Geometrical features — Part 1: General
terms and definitions
ISO 14978:2006, Geometrical product specifications (GPS) — General concepts and requirements for GPS
measuring equipment
ISO 17450-1:2011, Geometrical product specifications (GPS) — General concepts — Part 1: Model for
geometrical specification and verification
ISO/IEC Guide 98-3:2008, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in
measurement (GUM:1995)
ISO/IEC Guide 99:2007, International vocabulary of metrology — Basic and general concepts and
associated terms (VIM)
3 Terms and definitions
For the purposes of this document, the terms and defin
...