System and cost effectiveness analysis outputs:
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Maintainability is:
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An engineer must design a product with a probability of success 99%. Assume that both the strength and stress are normally distributed and that the standard deviations are the same.
If the stress is known to be 3000 lbs with a standard deviation of 100 lbs, what must be the approximate designed strength?
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For continual improvement in product reliability which of the following tests is MOST desirable?
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An airline maintains a fleet of 4-engine aircraft. Its maintenance records show that on the average an engine fails 3 times in 10,000 operating hours with normal preventive maintenance.
What is the Poisson distributed probability that 2 or more engines on an aircraft will fail during a typical flying period of 8 hours?
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