A small sample from a product population is subjected to multiple levels of elevated stress. Which of the following could be used to model the life of the product?
Response:
For a Weibull distribution the scale parameter, as a characteristic of time to failure, is a fixed percentile of the distribution regardless of its value. This percentile is:
Response:
What is the Z value needed to conduct a two tail test in a statistical inference problem, specifying 90% level of confidence?
Response:
In a life test of 4 batteries, failures were observed after 10, 30, and 40 hours. The 4th battery was tested
75 hours without failure, at which time the test was terminated.
What are the estimated Mean-Time-To-Failure (theta) and failure rate (lambda)?
Response:
Some keys to a successful reliability program include:
I. An evolutionary approach to new product development
II. Emphasis on manufacturing conformance to specifications
III. Development of strong long-term relationships with a small number of suppliers IV. The use of standards for guidance and lessons learned Response:
