olemus
ISO 5725-1:
vaatlustingimused, mille korral eri operaatorid saavad sõltumatud testimistulemused sama meetodiga,
identsetel testimis- või mõõtmisobjektidel,
kasutades erinevaid seadmeid
= observation conditions where independent test results are obtained with the same method on identical test or measurement items in different test or measurement facilities with different operators using different equipment