ISO INTERNATIONAL STANDARD 22514-6 Firstedition 2013-02-15 Statistical methods in process management Capability and performance - Part 6: Process capability statistics for characteristics following a multivariate normal distribution Meéthodes statistiques dans la gestion des processus - Capabilité et performance- Partie 6: Statistiques de capabilite pour un processus caractérise par une distribution normale multivariée Reference number IS0 22514-6:2013(E) LSO Copyright International Organization for Standardization @ IS0 2013 I without license from IHS Not for Resale IS0 22514-6:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 All rights reserved. Unless otherwise specified, 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 Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 22514-6:2013(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Abbreviated terms ..3 5 Process analysis. .4 6 Use of multivariate process capability and performance assessment ..4 7 Calculation of process capability and process performance ..4 7.1 Description of Types I and II. 7.2 Designation and symbols of the indices. .5 7.3 Types Ic and IIc process capability index .8 7.4 Types Ila and Type Ib process capability index ..10 8 Examples .11 8.1 Two-dimensional position tolerances ..11 8.2 Position and dimension of a slot .16 Annex A (informative) Derivation of formulae .20 Annex B (informative) Shaft imbalance example .25 Annex C (informative) Hole position example .29 Annex D (informative) Construction of the quality function ..33 Bibliography ..34 iii Stal dby IHS under se with IS thout license from IHS Not for Resale