A standardized reporting format enables information to be reported concisely and interpreted unambiguously, thereby reducing confusion. With stated exceptions, the International System of Quantities (ISO/IEC 80000, abbreviated “ISQ”) is followed. Specifically, reporting of quantities and units is based on the ISQ (ISO, 2009a), which in turn is based on BIPM (2014). Exceptions are permitted following the rules of Sec. 4.2.3.2 (for levels) and of IEEE (2004) (for unit symbols outside the ISQ). Definitions of quantities and units are based on ISO (2017), which in turn is based on the ISQ. Quantities and units outside the ISQ are permitted where defined by IEEE (2004). The following specific standards apply in the following order of decreasing precedence: – this standard (permitting exceptions per IEEE (2004)); – ISO 18405:2017 (ISO, 2017); – ISO 80000-8:2007 (ISO, 2007); – ISO 80000-3:2006 (ISO, 2006); – ISO 80000-2:2009 (ISO, 2009b); – ISO 80000-1:2009 (ISO (2009a); – BIPM (2014).

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