Reliability and Risk Management Flashcards
6 cards from real CQE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Reliability and Risk Management flashcards as text
In FMEA, which action would most effectively reduce a high Severity rating?
Answer: Redesigning the product or process to eliminate or mitigate the failure effect
Severity ratings can only be reduced by redesigning the product or process to change or eliminate the failure mode's effect on the customer, as severity reflects the inherent consequence of the failure.
Weibull analysis is used in reliability engineering primarily to:
Answer: Characterize failure time distributions and identify failure modes
Weibull analysis fits failure time data to the flexible Weibull distribution, whose shape parameter (beta) identifies whether failures are due to infant mortality (β1) modes.
What is meant by 'design redundancy' as a reliability strategy?
Answer: Providing backup components or systems so the system functions if one component fails
Design redundancy improves reliability by incorporating parallel components or subsystems that can take over function if a primary component fails, preventing system-level failure.
In risk management, what does a risk matrix primarily help determine?
Answer: The priority of risks based on likelihood and severity for mitigation planning
A risk matrix plots risks on a grid of likelihood versus severity, helping teams prioritize which risks require immediate mitigation versus monitoring versus acceptance.
Failure Mode, Effects, and Criticality Analysis (FMECA) extends FMEA by adding:
Answer: A criticality analysis that quantifies the probability and severity of each failure mode
FMECA adds a criticality analysis to FMEA, using failure rate data and mission time to mathematically quantify each failure mode's criticality, enabling more rigorous prioritization.
Which reliability growth model is commonly used to track and predict reliability improvement during development testing?
Answer: Duane/AMSAA model
The Duane/AMSAA (Army Materiel Systems Analysis Activity) model tracks cumulative test time and failures to project reliability growth and forecast when reliability targets will be achieved.