Documentation and Reporting Flashcards
7 cards from real CRE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Documentation and Reporting flashcards as text
A CRE is preparing a Reliability Program Plan (RPP). Which MIL standard provides the template structure most commonly referenced for defense programs?
Answer: MIL-STD-785
MIL-STD-785 (Reliability Program for Systems and Equipment Development and Production) defines the tasks and documentation structure for a defense reliability program plan.
In a Fault Tree Analysis (FTA) report, the 'minimum cut sets' section is important because it documents what?
Answer: The smallest combinations of basic events whose simultaneous occurrence causes the top event
Minimum cut sets identify the smallest independent failure combinations that can cause the top-level system failure, directly guiding design and maintenance priorities.
Which document type is used to formally request a change to a contractually baselined reliability requirement?
Answer: Engineering Change Proposal (ECP)
An Engineering Change Proposal (ECP) is the formal mechanism for proposing changes to baselined program requirements, including reliability requirements under configuration control.
A Life Cycle Cost (LCC) analysis report attributes a significant portion of total cost to reliability. Which cost category typically dominates in high-availability systems?
Answer: Operations and support (O&S) costs driven by maintenance and spares
For high-availability systems, operations and support costs — including corrective maintenance, preventive maintenance, and spare parts — typically dominate the total life cycle cost.
What does a 'confidence interval' of 90% lower one-sided bound on MTBF of 500 hours mean in a test report?
Answer: We are 90% confident the true MTBF is at least 500 hours
A one-sided lower 90% confidence bound of 500 hours means there is 90% statistical confidence that the true population MTBF is equal to or greater than 500 hours.
During a program design review, the reliability engineer presents a 'reliability allocation' document. What does this document accomplish?
Answer: It distributes the overall system reliability requirement down to subsystem and component levels
Reliability allocation cascades the top-level system reliability requirement down to lower-level subsystems so each design team has a quantitative reliability target to design toward.
Which action is required when a FRACAS report identifies a 'systemic' failure versus an 'isolated' failure?
Answer: Initiate a fleet-wide review and corrective action affecting all units, documented with broader scope
A systemic failure indicates a design or process deficiency affecting all units, requiring a documented fleet-wide corrective action rather than a unit-level repair.