DUI Metrology Dictionary
Reliability (general principle)
Reliability means different things in different fields. Social science reliability is different from reliability in nursing. In engineering you will find a lot of information by researching durability. In lab testing and calibration the gold test is ISO 17025 section 5.1. See also National Research Council of Canada. In breath testing, for instrumental reliability, use the Brian Hodgson definition: no significant drift in accuracy and precision over time.