Suppose a Given Control Unit Fails, on Average, Every 12,000

question 35

Multiple Choice

Suppose a given control unit fails, on average, every 12,000 hours. It takes an average of 900 hours to repair and reboot this unit. The repair/reboot procedures for this unit are being reconfigured. By how much would average repair/reboot time need to be reduced to increase availability by 5 percent (assuming the control unit's average life remains unchanged) ?

• A)not more than 200 hours
• B)more than 200 hours but not more than 400 hours
• C)more than 400 hours but not more than 600 hours
• D)more than 600 hours but not more than 800 hours
• E)more than 800 hours

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