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AS/NZS IEC 61703:2020 Mathematical expressions for reliability, availability, maintainability and maintenance support terms
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This Standard adopts IEC 61703:2016 which provides mathematical expressions for selected reliability, availability, maintainability and maintenance support measures defined in IEC 60050-192:2015. In addition, it introduces some terms not covered in IEC 60050-192:2015. They are related to aspects of the system of item classes (see hereafter).