Preventive Maintenence

Preventive Maintenance Stevenson ( two hundred9) includes problem 15S-3 to determine the optimum preventive sustenance frequency for distributively of the pieces of equipment if breakdown is normally distributed (p.732) The table at a lower place provides the side by side(p) minded(p) information: EquipmentAverage time amidst breakdowns (Days)Standard DeviationPreventive Maintenance Cost crumple Cost A201202$300 $2,300 B400303$200 $3,500 C850404$530 $4,800 According to Stevenson (2009), an optimal charge time interval for equipment, given the modal(a) time between breakdowns and ideal deviation, provides trading opeproportionns managers a decision-making tool for preventive maintenance with the drawn-out practical use of facilities or equipment without a breakdown (p. 730). Stevenson (2009) suggests first, using the ratio Preventive Cost/Breakdown Cost = probability to preserve the cost of preventive maintenance to the cost of a breakdown repair, t hen determining z, i.e.

, the number of standard deviations from the entail and adding the average time between breakdowns, optimal maintenance intervals for each pillowcase of equipment would be: EquipmentProbabilityZMean + Z = optimum Maintenance breakup A201$300/$2,300 = .1301.1220 1.12(2) = 17.76 days B400$200/$3,500 = .0571.5830 1.58(3) = 25.26 days C850$530/$4,800 = .1101.2240 1.22(4) = 35.12 days kinda of reading the z table values from the text, an online z-score calculator arse be used to find the number of standard deviations from the mean, given a probability ( ordinance Lab, n.d.). Referen ces ruler Lab. (n.d.). Z-score calculator ! [online application]. Retrieved from Formula Lab website http://www.fourmilab.ch/rpkp/experiments/analysis/zCalc.html Stevenson, W. (2009). Operations Management (10th ed.). newly York, NY: McGraw-Hill.If you wish to get a full essay, order it on our website: OrderCustomPaper.com

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