ISO/TR TECHNICAL REPORT 23076 First edition 2021-10 Ergonomics Recovery model for cyclical industrial work Ergonomie Modele de récuperation pour les activiteés cycliques dans I'industrie Reference number IS0/TR23076:2021(E) ISO @IS02021 IS0/TR 23076:2021(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may the internet or an intranet, withoutpriorwrittenpermission.Permission can be requested from eitherIso at the addressbelow or Iso's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214Vernier,Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org PublishedinSwitzerland i @ IS0 2021 - All rights reserved IS0/TR 23076:2021(E) Contents Page Foreword .iv Introduction .V 1 Scope. 1 2 Normative references .1 3 Terms and definitions. .2 4 Proposed approach .5 4.1 The correct work content. .5 4.2 Design of a standard working method .6 4.3 Work measurement. 7 4.3.1 General .7 4.3.2 Standard work performance 7 4.3.3 Realaction. .8 4.4 Task assignment and work organization 9 4.5 Biomechanical load measurement .10 4.6 Ergonomic work allowance (EWA) 11 4.6.1 General 11 4.6.2 Traditional approach 12 4.6.3 Proposed approach: EWA 13 4.6.4 Design criteria 18 4.7 Organizational solutions. .19 4.7.1 General 19 4.7.2 Strategies to reduce the overall load index 19 5 Ergonomic assessment worksheet (EAws) 20 5.1 System overview. 20 5.2 EAWS basic structure. 20 5.2.1 General 20 5.2.2 Section O: extra points 23 5.2.3 Section 1: body postures 24 5.2.4 Section2:actionforces 25 5.2.5 Section 3: manual material handling of loads 26 5.2.6 Section 4: repetitive motions of the upper limbs 27 EWA effect on EAWS score 29 6.1 General. 29 6.2 Effect of recovery time on typical workstations. 32 6.3 EAWS based EWA model. 33 Annex A (informative) EAwS scoring procedure 35 Bibliography 144 IS02021-All rights reserved jii IS0/TR 23076:2021(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 throughIsotechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnical 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. The procedures used to develop this document and those intended for its further maintenance are described in the IsO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of IsO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the Iso list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constituteanendorsement. For an explanation of the voluntary nature of standards, the meaning of IsO specific terms and expressions related to conformity assessment, as well as information about Iso's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html. This document was prepared by Technical Committee ISO/TC 159, Ergonomics, Subcommittee SC 3, Anthropometry and biomechanics. Any feedback o