RAM Communication & Documentation 2 — Questions and Answers
Question 1: Which document formally authorizes a maintenance team to perform corrective work on a critical system?
- Work order (Correct answer)
- Maintenance log
- Failure mode register
- FMECA worksheet
Correct answer: Work order
A work order is the formal authorization document that directs and permits maintenance personnel to perform specific repair or corrective tasks.
Question 2: In RAM documentation, what does the acronym MTTR specifically measure?
- Mean Time To Repair (Correct answer)
- Maximum Time To Recover
- Minimum Task Turnaround Rate
- Mean Total Time Restored
Correct answer: Mean Time To Repair
MTTR stands for Mean Time To Repair and quantifies the average time needed to restore a failed component or system to operational status.
Question 3: A RAM engineer needs to communicate the probability that a system will be operational at any random moment. Which metric should be reported?
- Instantaneous availability (Correct answer)
- MTBF
- Inherent reliability
- Failure rate λ
Correct answer: Instantaneous availability
Instantaneous (or point) availability expresses the probability that a system is functioning at a specific point in time, which is what the engineer needs to report.
Question 4: Which type of report is BEST used to communicate trends in equipment reliability over successive operating periods?
- Reliability growth trend report (Correct answer)
- Single-event failure report
- Corrective maintenance log
- Parts consumption summary
Correct answer: Reliability growth trend report
A reliability growth trend report tracks changes in failure rates or MTBF across multiple periods, enabling teams to see whether reliability is improving or degrading.
Question 5: When documenting a failure in a maintenance management system, which information is LEAST essential for a RAM analysis?
- Technician's employee ID number (Correct answer)
- Failure mode observed
- Time of failure detection
- System operating hours at failure
Correct answer: Technician's employee ID number
The technician's employee ID is an administrative detail; RAM analysis relies on failure mode, detection time, and operating hours to compute reliability metrics.
Question 6: A maintenance procedure document should include action steps written in which grammatical form to minimize ambiguity?
- Imperative (command) form (Correct answer)
- Passive voice
- Future tense
- Subjunctive mood
Correct answer: Imperative (command) form
Technical maintenance procedures use the imperative (command) form — e.g., 'Tighten the bolt' — to give unambiguous, direct instructions.
Question 7: Which standard is most widely referenced for establishing requirements on technical manuals and maintenance documentation in defense RAM programs?
- MIL-DTL-17655 (Correct answer)
- ISO 9001
- IEC 60300-3-14
- IEEE 1633
Correct answer: MIL-DTL-17655
MIL-DTL-17655 (and the broader MIL-HDBK-series) governs technical manual requirements for defense systems, making it the primary reference for defense RAM documentation.
RAM Communication & Documentation 2
Which document formally authorizes a maintenance team to perform corrective work on a critical system?