An Introduction to Reliability and
Maintainability Engineering, 3rd Edition
(2019) – Ebeling – Solutions Manual PDF
In addition to probability, which of the following are also elements in the measurement of
reliability?
Select the three alternatives that apply. - answer-1.** Performance
2.** Time
3.*** Operating Conditions2
Using the data from the truck example, calculate the generators' MTBR (for-cause). After two
years, the fleet had accumulated 1,000,000 operating hours. There were 100 incidents in which
a truck broke down due to generator failure. Overall, there were 1,200 "maintenance events"
involving generators, as follows:
100 on-equipment repairs (by turning wrenches, screwdrivers, etc.)
200 removals to facilitate other maintenance (50 of these resulted in damage to the
generators).
900 removals for-cause that were forwarded to the depot for repair, where 600 were identified
as design or manufacturing related problems - answer-1,111 hours
Which of the following address supply and maintenance issues affecting a system? - answer-
Mean Time Between Demand (MTBD)
1
, Mean Time Between Failure (MTBF)Mean Time Between Removal (MTBR)Mean Time Between
Unscheduled Maintenance (MTBUM)
Which of the following is a brief definition of maintainability? - answer-The relative ease and
economy of time and resources with which an item can be retained or restored to a specific
condition.
The table shows the Mean Miles Between Failure for the two cars. Which car is more reliable?
Categories Hard Top Convertible
Miles 130,000 85,000
Number of Failures 3 7
Mean Miles Between Failures 43,333 miles 12,143 miles - answer-Hard Top
Based on the data, which car takes less time to repair?
Categories Hard Top Convertible
Number of Failures 3 7
Total Repair Time 30 hours 42 hours
MeanTime To Repair 10 hours 6 hours - answer-Convertible
2
Maintainability Engineering, 3rd Edition
(2019) – Ebeling – Solutions Manual PDF
In addition to probability, which of the following are also elements in the measurement of
reliability?
Select the three alternatives that apply. - answer-1.** Performance
2.** Time
3.*** Operating Conditions2
Using the data from the truck example, calculate the generators' MTBR (for-cause). After two
years, the fleet had accumulated 1,000,000 operating hours. There were 100 incidents in which
a truck broke down due to generator failure. Overall, there were 1,200 "maintenance events"
involving generators, as follows:
100 on-equipment repairs (by turning wrenches, screwdrivers, etc.)
200 removals to facilitate other maintenance (50 of these resulted in damage to the
generators).
900 removals for-cause that were forwarded to the depot for repair, where 600 were identified
as design or manufacturing related problems - answer-1,111 hours
Which of the following address supply and maintenance issues affecting a system? - answer-
Mean Time Between Demand (MTBD)
1
, Mean Time Between Failure (MTBF)Mean Time Between Removal (MTBR)Mean Time Between
Unscheduled Maintenance (MTBUM)
Which of the following is a brief definition of maintainability? - answer-The relative ease and
economy of time and resources with which an item can be retained or restored to a specific
condition.
The table shows the Mean Miles Between Failure for the two cars. Which car is more reliable?
Categories Hard Top Convertible
Miles 130,000 85,000
Number of Failures 3 7
Mean Miles Between Failures 43,333 miles 12,143 miles - answer-Hard Top
Based on the data, which car takes less time to repair?
Categories Hard Top Convertible
Number of Failures 3 7
Total Repair Time 30 hours 42 hours
MeanTime To Repair 10 hours 6 hours - answer-Convertible
2
