What is the probability of a breakdown before given hours


Problem:

Consider a product that is "settled in." Its MTBF distribution has been found to be normal with a mean of 10,000 hours and a standard deviation of 100 hours.

Required:

Question 1) What is the probability of a breakdown before 8,000 hours? Before 9,000 hours? Would you prefer a policy of preventive maintenance, or a policy of breakdown maintenance, on this product?

Explain your choice. A good logical explanation is critical in this discussion.Provide thorough explanation of the given question.

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Operation Management: What is the probability of a breakdown before given hours
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