For organisations operating in or with the UK, BSI recommends purchasing the adopted British Standard.
This document specifies requirements for reference measurement procedures (RMP) for measurands used in laboratory medicine.
This document applies to:
RMPs providing values of differential or rational quantities where each quantity value is a numerical value multiplied by a measurement unit. Annex A provides information on ordinal quantities and nominal properties;
any person, body or institution developing RMPs for measurands used in laboratory medicine.