TECHNICAL ISO/TR REPORT 14121-2 Second edition 2012-06-01 Safety of machinery Risk assessment - Part 2: Practical guidance and examples of methods Sécurité desmachines-Appréciation durisque- Partie 2: Lignes directrices pratiques et exemples de methodes Reference number ISO/TR 14121-2:2012(E) @ISO2012 ISO/TR14121-2:2012(E) Contents Page Foreword ..iv Introduction 1 Scope 2 Normative references 3 Terms and definitions.. 4 Preparation for risk assessment. 4.1 General.... 4.2 Using the team approach for risk assessment 5 Riskassessmentprocess 5.1 General... 5.2 Determinationofthelimitsofthemachinery 5.3 Hazard identification.. 5.4 Riskestimation 6 6 Risk estimation tools 9 6.1 General 9 6.2 Risk matrix 9 6.3 Risk graph 12 6.4 Numerical scoring 14 6.5 Hybrid tool 15 7 Risk evaluation 19 8 Risk reduction 19 8.1 General 19 8.2 Inherently safe design.. 19 8.3 Safeguarding .... 20 8.4 Complementary protective/risk reduction measures 21 8.5 Information for use .. 21 8.6 Standard operating procedures. 22 9 Risk assessment iteration.. 22 10 Documentation of risk assessment. 22 Annex A (informative) Example application of the process of risk assessment and risk reduction .... 23 Bibliography 38 @ ISO 2012 -All rights reserved ili ISO/TR 14121-2:2012(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In exceptional circumstances, when a technical committee has collected data of a different kind from that informative in nature and does not have to be reviewed until the data it provides are considered to be no longer validoruseful. 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. ISO/TR14121-2waspreparedbyTechnicalCommitteeISO/TC199,Safetyof machinery. This second edition cancels and replaces the first edition (ISO/TR 14121-2:2007), which has been revised as follows: beendeleted the explanations of the methods or tools, taken from Annex A, are now presented in 5.3.5 for hazard identification and 5.4.4.1 for risk estimation; the terminology and criteria have been revised; iv @ ISO 2012 - All rights reserved