Asked by Michael Culham on Jul 26, 2024
Verified
The MTBF distribution of a machine that has passed the phase of early failures exhibits a normal distribution. The smaller the standard deviation of this distribution
A) the more expensive is preventive maintenance.
B) the more likely this machine is a candidate for preventive maintenance.
C) the shorter is the time interval between breakdowns.
D) the more likely this machine will break down.
E) the more likely this machine will be maintained by a breakdown maintenance policy.
MTBF Distribution
The probability distribution of time between failures for a repairable system, representing Mean Time Between Failures.
Standard Deviation
A numeric value that represents the extent of spread or variability among a dataset.
- Recognize the essential elements that qualify a system for preventive maintenance suitability.
- Understand the statistical distributions associated with the life cycles of products, including the normal and exponential distributions.
Verified Answer
MB
Maurice BruceJul 29, 2024
Final Answer :
B
Explanation :
A normal distribution with a smaller standard deviation indicates that the machine is more reliable and its failure rate is more predictable. Therefore, it is a good candidate for preventive maintenance to avoid unexpected breakdowns.
Learning Objectives
- Recognize the essential elements that qualify a system for preventive maintenance suitability.
- Understand the statistical distributions associated with the life cycles of products, including the normal and exponential distributions.