Definition(s)
Survival Probability, R(t)
Likelihood of the continued functioning of an item, as given by Equation (1):
R(t ) = Pr (T > t ) (1)
where Pr is the probability that T, the time to failure of an item, is greater than t, a time equal to or greater than 0.
Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards