a) Calculate the Mean Time Between Failures for the following device in days. (365 days in one year)

Meant Time To Failure = 3 years

Mean Time To Repair = 9 days

b) What is the availability of this device in percentage to two decimal places?

c) As Mean Time To Repair approaches 0, availability approaches?

d) As Mean Time To Failure increases, availability approaches?

e) If your company provided lifetime warranty for the system through an extended warranty service, how many warranty replacements would need to be planned for each each year using average failure rate, AFR? (use 365 days per year)

MTTF 400,000 hours

20,000 systems in the extended warranty program

(format is a whole number since partial systems cannot be replaced. Always round up)