Standard operating procedures

Standard operating procedures (SOPs) should be documented for all routine methods and for individual items of equipment to ensure that data are collected consistently and accurately. When there is more than one approved technique for any given procedure, all should be covered by SOPs.
SOPs should be written in simple language, readily accessible, and ideally in a standardised format. They should be updated as necessary, and only the current version should be available. Standard written protocols should also be available covering the process of seeking informed consent from patients or volunteers, to ensure clarity and consistency. Written protocols are likewise essential for ensuring strict adherance to regulations/licences, for example in research involving animals.