Utilization ratio = (actual running time of cutting machine/total production time) × 100%. For example, a cutting machine works 8 hours a day, but the actual running time is only 7 hours due to equipment maintenance, tool change and other reasons, so the utilization rate is: utilization rate =(7 hours /8 hours) × 100%=87.5%, that is to say, the utilization rate of the cutting machine on this day is 87.5%, with 12.