dearkundan asked 14 years ago
Hi
MTBF of an Set Top Box (STB) can be validated by an accelerated life test (ALT) by putting N number of boxes for T hrs at a stressed temperature, say 45degC. MTBF shall be NxTx Acceleration factor depending on the temperature stress.
AF can be calculated using formula “AF = exp{(Ea/k)[(1/Tu)-(1/Ta)]}”. I am stuck here. For calculating AF, we need the value of Ea, activation energy. Pls. suggest how to claculate the value of Ea for an STB or at least a healthy estimate.
Thanks.
Kundan.