the closeness of agreement between independent test results obtained by applying the experimental procedure under stipulated conditions, closeness of agreement between independent test results obtained under stipulated (predetermined) conditions, eelnevalt määratud tingimustel sooritatud sõltumatute katsete tulemuste lähedusaste, sama objekti korduval mõõtmisel sama mõõtmisvahendiga saadavate tulemuste lähesus