Template:P ratio crow rga

$$p$$ Ratio
In the Crow Extended - Continuous evaluation, there is a certain probability of not incorporating a corrective action by time  $$T$$. This is the additional (third parameter), as compared to the Crow Extended model. We define $$p$$  as:


 * $$p=\frac{\text{All modes such that, if seen, will be corrected at time }T\text{, or later}}{\text{All failure modes such that, if seen, the corrective action will be delayed}}$$

It is assumed that the ratio $$p$$  remains fixed over. This implies that each time a distinct failure mode is seen, the probability that the corrective action is delayed until time $$T$$  or later is  $$p$$. In other words, each time a new BD mode is seen over $$(0,T)$$  there is a probability  $$p$$  that the corrective action for that mode will not have been incorporated into the system by time  $$T$$. Under the Crow Extended two-parameter model, this probability is always equal to 1 at time $$T.$$