ISO INTERNATIONAL STANDARD 9241-420 First edition 2011-07-15 Ergonomics of human-system interaction - Part 420: Selection of physical input devices Ergonomiede l'interactionhomme-systeme- Partie 420: Sélection des dispositifs d'entree physiques Reference number ISO 9241-420:2011(E) @ISO 2011 Copyright Intemational Organization for Standardization without license from IHS Not for Resale, 12/22/2015 18:37:46 MST ISO9241-420:2011(E) COPYRIGHTPROTECTEDDOCUMENT ISO2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, 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 @ ISO 2011 All rights reserved without ficense from IHS Not for Resale, 12/22/2015 18:37:46 MST ISO9241-420:2011(E) Contents Page Foreword .vii Introductior ..ix 1 Scope, 2 Normative references 3 Terms and definitions. 4 Proceduresfor selecting equipmentGeneral considerations 11 4.1 Rationale.... 4.2 Objectivesforselectionprocedures.. 13 5 Performance criterion.. 13 6 Methods and aids for selection of devices .. 14 6.1 Task analysis....... 14 6.2 Selectionbasedonproductdescription. 14 6.3 User tests ... 14 6.4 Selection based on dominant task primitive(s) with overriding importance 15 6.5 Selecting a keyboard..... 17 7 Field assessment of input devices 18 7.1 Rationale........ .18 7.2 Methods........ .19 AnnexA(informative)OverviewoftheISo9241series. 23 AnnexB (informative)Tracing test. ..24 Annex C (informative)Dragging test... .26 AnnexD(informative)Assessmentofcomfort.... ..28 AnnexE(informative)One-directiontappingtest. 32 Annex F (informative) Multi-directional tapping test. ..35 Annex G (informative)Test for mobile textentry (hand-heldkeyboards). ..37 Annex H (normative)Tables for selecting devices in consideration of product description... ....40 AnnexI(informative)Usabilitytestforkeyboards .93 Bibliography... .94 Tables Annex H TableH.1Correspondencewithgenericrequirementsoncompactkeyboards Appropriateness.. 47 Table H.2 -CorrespondencewithgenericrequirementsoncompactkeyboardsOperability... Table H.3- Correspondencewithgenericrequirementsoncompactkeyboards-Controllability....47 Table H.4 Correspondencewithgenericrequirementsoncompactkeyboards- Biomechanical load..... .48 Table H.5Functional properties of compact keyboardsDesign of keys of compact keyboards- .48 Table H.6- Functional propertiesofcompactkeyboards-DesignofkeysKeylegends ..... TableH.7FunctionalpropertiesofcompactkeyboardsDesignofkeyboard-Sectionsand zones. 49 ili cense from IHS Not for Resale, 12/22/2015 18:37:46 MST ISO9241-420:2011(E) TableH.8—Functionalpropertiesof compactkeyboardsDesignofkeyboardMechanical design ...... Table H.9Other considerations for compact keyboardsElectrical properties... Table H.10 - Other considerations for compact keyboards - Maintainability-related properties...50 TableH.12—Otherconsiderationsforcompactkeyboards—Documentation... TableH.13—Correspondencewithgeneric requirements onfull-sizekeyboards Appropriateness ......... Table H.14Correspondence with generic requirements on full-size keyboards Operability....51 Table H.15Correspondence with generic requirements on full-size keyboards ...51 Table H.16Correspondence with generic requirements on full-size keyboards - Biomechanicalload........ Table H.17 - Functional properties of full-size keyboards - Design of keys - Design of keys....52 Table H.18 - Functional properties ofull-size keyboards - Design of keys - Key iegends ...52 TableH.19Functional propertiesoffull-sizekeyboards—Designofkeyboard-Sectionsand zones.... TableH.2oFunctional properties of full-sizekeyboards—Design ofkeyboardMechanical Table H.21Otherconsiderationsfor full-sizekeyboardsElectrical properties .... Table H.22Other considerations for full-size keyboards Maintainability-related properties....5