ASEP System Safety and Reliability Engineering 2

Question 1

What does 'availability' mean in systems engineering?

Accepted Answer

The fraction of time a system is in a functional and ready state

Answer

Availability is the probability (or fraction of time) that a system is in an operable and committable state at any given point in time.

Question 2

In FMEA, the Risk Priority Number (RPN) is calculated as:

Accepted Answer

Severity × Occurrence × Detectability

Answer

RPN = Severity × Occurrence × Detectability, and is used to prioritize failure modes for corrective action.

Question 3

Which reliability growth model is commonly used to track defect elimination progress during testing?

Accepted Answer

Crow-AMSAA model

Answer

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.

Question 4

What is 'redundancy' and how does it improve system reliability?

Accepted Answer

Redundancy adds backup components so that if one fails, another takes over, increasing overall reliability

Answer

Redundancy provides backup components or subsystems so that system function is maintained even when a primary component fails, improving reliability.

Question 5

What is 'maintainability' in systems engineering?

Accepted Answer

The ability of a system to be retained in or restored to a specified condition within a given time

Answer

Maintainability is the measure of the ease and speed with which a system can be restored to operational status after a failure.

ASEP - Associate Systems Engineering Professional Practice Test

ASEP - Associate Systems Engineering Professional Practice Test

ASEP System Safety and Reliability Engineering 2