Template:Alta exponential conditional reliability

Conditional Reliability
The conditional reliability function for the 1-parameter exponential distribution is given by:
 * $$R(T,t)=\frac{R(T+t)}{R(T)}=\frac={{e}^{-\lambda t}}$$

which says that the reliability for a mission of $$t$$  duration undertaken after the component or equipment has already accumulated  $$T$$  hours of operation from age zero is only a function of the mission duration, and not a function of the age at the beginning of the mission. This is referred to as the ``memoryless property.''