JIS B 9971:2019 specifies requirements for competence of personnel responsible for the safety of machines used in the industrial field among machines as specified in JIS B 9700. This Standard categorizes competence required to perform risk assessment and to implement protective measures based on the results of risk assessment. It also specifies knowledge and skills required for the respective categories. This Standard does not cover knowledge and skills of design and manufacture of general machines, or knowledge and skills required in specific technical fields, other than those required in the field of machinery safety. It also does not cover ethics required of technicians who are engaged in specialized works based on those knowledge and skills.