System Safety and Reliability Engineering Flashcards
6 cards from real ASEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 System Safety and Reliability Engineering flashcards as text
What does 'availability' mean in systems engineering?
Answer: The fraction of time a system is in a functional and ready state
Availability is the probability (or fraction of time) that a system is in an operable and committable state at any given point in time.
In FMEA, the Risk Priority Number (RPN) is calculated as:
Answer: Severity × Occurrence × Detectability
RPN = Severity × Occurrence × Detectability, and is used to prioritize failure modes for corrective action.
Which reliability growth model is commonly used to track defect elimination progress during testing?
Answer: Crow-AMSAA model
The Crow-AMSAA (AMSAA Reliability Growth) model is widely used in the US defense and aerospace sectors to track and project reliability growth during developmental testing.
What is 'redundancy' and how does it improve system reliability?
Answer: Redundancy adds backup components so that if one fails, another takes over, increasing overall reliability
Redundancy provides backup components or subsystems so that system function is maintained even when a primary component fails, improving reliability.
What is 'maintainability' in systems engineering?
Answer: The ability of a system to be retained in or restored to a specified condition within a given time
Maintainability is the measure of the ease and speed with which a system can be restored to operational status after a failure.
Which of the following is an example of an inherently safe design approach?
Answer: Eliminating the hazard at the source by redesigning the system
Inherently safe design eliminates the hazard at its source through design changes rather than relying on controls, warnings, or procedures.