-Corrective Maintenance versus Preventive Maintenance The Heavy Duty Company has just purchased a large machine for a new production process. The machine is powered by a motor that occasionally breaks down and requires a major overhaul. Therefore, a second standby motor is kept, and the two motors are rotated in use. The breakdowns always occur on the fourth, fifth, or sixth day that the motor is in use. Fortunately, it takes fewer than three days to overhaul a motor, so a replacement is always ready. Cost of a Replacement Cycle that Begins with a Breakdown Replace a Motor. Lost production during replacement $2,000 5,000 Overhaul a motor 4,000 Total $11,000 0125 0:5 0. 0.25 0.249 0.749: 75 day -0.25 0.75 I b day 4th th 6"day - Case Corrective. Maintance. 1000 Cash Preventive maintaine 6000 Probability Distribution of Breakdowns 30yr. Manton Vande sharaft. Contract for Day 1,2,3 4 5 6 7 or more 2023.08.01 22:30 12-8 Probability of a Breakdown Corresponding Random Numbers 0 0 0.25 0.0000 to 0.2499 0.5 0.2500 to 0.7499 0.25 0.7500 to 0.9999