A prototype test should reproduce the operating boundaryA prototype test should reproduce the operating boundaryCONTROLActual power lossEnclosure + airflowMounting + interfaceMEASUREDefined sensor pointSteady-state criterionInstrument uncertaintyRECONCILEModel differencesWorst-case conditionsRelease evidence³Ô¹Ïtv · ENGINEERING ILLUSTRATION · NOT A QUALIFIED CONSTRUCTION