Before revision: Member of Optical Society of America, IEEE, "Automated Reliability Prediction, SR-332, Issue 3 " , January 2011 ; "Automated Reliability Prediction (ARPP), FD-ARPP-01, Issue 11 " , January 2011 Every product has a failure rate, λ which is the number of units failing per unit time.
After revision: Member of Optical Society of America, IEEE, "Automated Reliability Prediction, SR-332, Issue 3 " SR-332 ; "Automated Reliability Prediction (ARPP), FD-ARPP-01, Issue 11 " FD-ARPP-01 Every product has a failure rate, λ which is the number of units failing per unit time.