Production and Operations Analysis, Seventh Edition
Production and Operations Analysis, Seventh Edition
7th Edition
ISBN: 9781478623069
Author: Steven Nahmias, Tava Lennon Olsen
Publisher: Waveland Press, Inc.
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An injection molding system has a first cost of $90,000, and an annual operating cost of $42,000 in year 1, increasing by $5000 per year thereafter. The salvage value of the system is 30,000 if you sell after 1 year of use. The salvage value decreases by $5,000 each year thereafter. The maximum useful life of the machine is 4 years. Using a MARR of 20% per year, determine the ESL and the corresponding Equivalent Annual Cost of the system.
A rural cooperative purchased a trencher at a cost of P230,500.00. It is estimated that the trencher will have a salvage value of P25,000.00 after digging 300,000 meters of irrigation canals. Determine the book value of the trencher after two years, if it was used to dig 50,000 meters on the first year and 75,000 meters on the second year. (Ans. P144,875.00)
Determine the optimum preventive maintenance frequency for each of the pieces of equipment if breakdown time is normally distributed: (Round "Probability Ratio" to 4 decimal places, and all other answers to 2 decimal places. Negative values should be indicated by a minus sign.) Use Table. Equipment. A201 B400 C850 Equipment A201 B400 CB50 Equipment Average Time (days) between Breakdowns A201 B400 C850 20 30 45 Preventive Maintenance Cost Click here for the Excel Data File: $330 $230 $580 Probability Ratio Standard Deviation 3 Breakdown Cont $2,230 $3,530 $4,825 Interval (days)
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