RAM Communication & Documentation 3 — Questions and Answers
Question 1: In an FMEA report, the 'Detection' rating specifically communicates the team's confidence in which capability?
- Ability of current controls to detect the failure before it reaches the customer (Correct answer)
- Speed at which maintenance is performed after failure
- Probability that the failure will occur
- Severity of the failure's impact on safety
Correct answer: Ability of current controls to detect the failure before it reaches the customer
The Detection rating in an FMEA scores how well current design or process controls can identify the failure mode before it affects the end user.
Question 2: A RAM report states system availability is 99.5%. A stakeholder asks what downtime this implies per year. What is the correct answer?
- Approximately 43.8 hours (Correct answer)
- Approximately 4.4 hours
- Approximately 438 hours
- Approximately 0.5 hours
Correct answer: Approximately 43.8 hours
0.5% of 8,760 hours/year = 43.8 hours of expected downtime, so 99.5% availability implies roughly 43.8 hours of annual downtime.
Question 3: Which document type serves as the single source of truth for all approved changes to a system's maintenance program?
- Configuration management record (Correct answer)
- Field service bulletin
- Operator's manual
- Spare parts catalog
Correct answer: Configuration management record
Configuration management records formally track and authorize all approved changes, making them the authoritative baseline for maintenance program modifications.
Question 4: During a design review, a RAM engineer presents a Pareto chart of failure modes. What communication objective does this chart PRIMARILY serve?
- To prioritize the few failure modes responsible for most downtime (Correct answer)
- To show the chronological sequence of failures
- To prove that all failure modes have been eliminated
- To document maintenance labor costs
Correct answer: To prioritize the few failure modes responsible for most downtime
A Pareto chart visually highlights the 'vital few' failure modes that drive the majority of downtime, guiding the team toward the highest-impact corrective actions.
Question 5: A Reliability Block Diagram (RBD) is most useful for communicating which aspect of a system to stakeholders?
- How the logical arrangement of components affects overall system availability (Correct answer)
- The step-by-step maintenance procedure for each component
- The procurement lead times for spare parts
- The organizational chart of the maintenance team
Correct answer: How the logical arrangement of components affects overall system availability
An RBD maps the logical (series/parallel) relationships between components to show how individual reliabilities combine to determine system-level availability.
Question 6: Which metric should a technical writer highlight in a maintenance summary report to best convey the ease of performing scheduled maintenance?
- Mean Preventive Maintenance Time (MPMT) (Correct answer)
- Mean Time Between Failures (MTBF)
- System reliability R(t)
- Failure rate λ
Correct answer: Mean Preventive Maintenance Time (MPMT)
MPMT measures the average time required to carry out preventive maintenance tasks, directly reflecting how maintainable the system is under scheduled servicing.
Question 7: An after-action review (AAR) document following a major system failure should PRIMARILY focus on communicating which information?
- Root causes, lessons learned, and corrective actions (Correct answer)
- Spare parts inventory levels at time of failure
- Technician work hours billed to the job
- Vendor contract terms and pricing
Correct answer: Root causes, lessons learned, and corrective actions
An AAR is designed to capture root causes and lessons learned so that corrective actions can be defined and future failures prevented.
RAM Communication & Documentation 3
In an FMEA report, the 'Detection' rating specifically communicates the team's confidence in which capability?