ISO/TS TECHNICAL SPECIFICATION 20282-2 Second edition 2013-08-01 Usability of consumer products and products for public use - Part 2: Summative test method Facilité d'emploi des produits de consommation courante et des produits a usage public - Partie 2: Méthode d'essai sommative Reference number IS0/TS 20282-2:2013(E) ISO @ IS0 2013 IS0/TS 20282-2:2013(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 the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax+41227490947 E-mail copyright@iso.org Web www.iso.org Published in Switzerland IS02013-All rightsreserved IS0/TS 20282-2:2013(E) Contents Page Foreword ..iv Introduction ..V 1 Scope. ..1 2 Conformity ...2 3 Normative references ..2 4 Terms and definitions ..2 5 General principles. .6 5.1 Type of usage of the product to be tested. ..6 5.2 Purpose of the test. ..6 5.3 Scope of the goals used in the test .7 5.4 Validity and reliability .9 5.5 Ethical issues .9 6 Test procedure overview. .9 7 Test method .10 7.1 Purpose and scope of the test 10 7.2 Product(s) to be tested. .10 7.3 Context of evaluation. .10 7.4 Check that the product is capable of achieving the intended goals for the intended users. ..15 7.5 Design and perform the test. .16 8 Results. .20 8.1 General 20 8.2 Goals. 20 8.3 Effectiveness 20 8.4 Efficiency.... 21 8.5 Satisfaction 21 9 Report. ..21 Annex A (informative) User goals .22 Annex B (informative) Background to the method .25 Annex C (normative) Recruiting a representative sample of users ..26 Annex D (normative) Confidence intervals ..29 Annex E (normative) Examples of satisfaction scales. ..33 Annex F (normative) Format for test reports ..35 Annex G (normative) Specification of usability requirements ..41 Annex H (normative) Usability test procedure specification ..4 Annex I (informative) Feedback on the standard ..48 Bibliography ..49 @.isn.2013llrightsreserved ii