5. Glossary

reliability [ ECSS-S-ST-00-01C ]

Probability that a system will perform a required function, under certain conditions, for a certain period of time. This probability is a function of time and is denoted R(t).

Défaillance ; failure [ ECSS-S-ST-00-01C ]

Event leading to the end of an element's ability to perform a required function.

Failure rate [ IEC 61131-6 ]

Reliability parameter λ(t) of an entity (components or simple systems) such that λ(t) · dt is the probability of failure of this entity between t and t + dt, provided no failure has occurred between...