Question: For a mainframe computer, a preventive maintenance inspection and repair cycle costs a total of $2,000 on the average. If the computer breaks down, an
For a mainframe computer, a preventive maintenance inspection and repair cycle costs a total of $2,000 on the average. If the computer breaks down, an average cost of $5,000 is incurred. The historical breakdown pattern for the computer is the following:
| Months between PM | Average number of breakdowns between PM |
| 1 | 0.2 |
| 2 | 0.6 |
| 3 | 1.8 |
| 4 | 3.6 |
| 5 | 7.0 |
a) Recommend how often preventive maintenance should be performed.
b) For the above information, suppose that the average cost of a breakdown is unknown. What is the breakdown cost that would have the total cost of the 2-month PM cycle equal to the 3-month PM cycle?
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