ISO INTERNATIONAL STANDARD 16336 First edition 2014-07-01 Applications of statistical and related methods to new technology and product development process Robust parameter design (RPD) Application demethodologies statistiqueset connexespourle développement de nouvelles technologies et de nouveaux produits Modele paramétrique robuste Reference number IS0 16336:2014(E) LSO IS02014 HS under Not for Resale IS0 16336:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2014 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 2014 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 16336:2014(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions and symbols ..1 3.1 Term and definitions. .1 3.2 Symbols... ..3 4 Robust parameter design - Overview. ..4 4.1 Requirements. .4 4.2 Assessingtherobustnessofasystem .4 4.3 Robustness assessment through SN ratio .6 4.4 An efficient method for assessing technical ideas - - Parameter design .7 4.5 Two-step optimization (Strategy of parameter design) ..8 4.6 Determination of the optimum design ..10 5 Assessment of robustness by SN ratio ..10 5.1 Concepts of SN ratio. .10 5.2 Types of SN ratio .11 5.3 Procedure of the quantification of robustness .11 5.4 Formulation of SN ratio: Calculation using decomposition of total sum of squares .13 5.5 Some topics of SN ratio... .19 6 Procedure of a parameter design experiment .20 6.1 General 20 6.2 (Step 1) Clarify the system's ideal function 20 6.3 (Step 2) Select a signal factor and its range 21 6.4 (Step 3) Select measurement method of output response. 21 6.5 (Step 4) Develop noise strategy and select noise factors and their levels 21 6.6 (Step 5) Select control factors and their levels from design parameters .22 6.7 (Step 6) Assign experimental factors to inner or outer array .22 6.8 (Step 7) Conduct experiment and collect data, .23 6.9 (Step 8) Calculate SN ratio, n, and sensitivity, S 23 6.10 (Step 9) Generate factorial effect diagrams on SN ratio and sensitivity 26 6.11 (Step 10) Select the optimum condition 28 6.12 (Step 11) Estimate the improvement in robustness by the gain 28 6.13 (Step 12) Conduct a confirmation experiment and check the gain and "reproducibility".29 7 Case study Parameter design of a lamp cooling system .30 Annex A (informative) Comparison of a system's robustness using SN ratio ..40 Annex B (informative) Case studies and SN ratio in various technical fields .47 Bibliography .72 iii Not for Resale