作者Uxorious

這位大哥您的算法不對喔！
請參考一下下面的網頁：
http://www.t-cubed.com/faq_mtbf.htm
節錄一下重點：

MTBF = 1/(sum of all the part failure rates)

and the probability that the product will work for some time T
without failure is given by:

R(T) = exp(-T/MTBF)

給您參考一下