Name .......... .... Student ID Problem 6. With the estimates of machines X and Y are shown below and MARR of 15% per year is assumed. Defender: Machine X 8,000 Challenger: Machine Y Original cost 3 year ago, Baht Investment cost now, Baht Market value, Baht Annual operating cost, Baht Decrease by 25% per year 2,000 for the first year and to increase by 1,000 baht per year thereafter 10,000 Decrease by 15% per year 4,000 for the first year and to increase by 5% per year thereafter Remaining life, years Estimated physical life, years Show your solution to get full score. 6.1 (4 Points) What is the ESL and associated AW of machine X? 6.2 (2 Points) Let ESL of the challenger Y is 6 years with the associated AW of -6,788.84 baht per year. Should machine X be retained or replaced at the presence? 6.3 (4 Points) Perform one-year later analysis in which no technological change is assumed (Only machine Y is considered to replace machine X in the next 4 years from now). How many years from now that machine X should be retained? Name .......... .... Student ID Problem 6. With the estimates of machines X and Y are shown below and MARR of 15% per year is assumed. Defender: Machine X 8,000 Challenger: Machine Y Original cost 3 year ago, Baht Investment cost now, Baht Market value, Baht Annual operating cost, Baht Decrease by 25% per year 2,000 for the first year and to increase by 1,000 baht per year thereafter 10,000 Decrease by 15% per year 4,000 for the first year and to increase by 5% per year thereafter Remaining life, years Estimated physical life, years Show your solution to get full score. 6.1 (4 Points) What is the ESL and associated AW of machine X? 6.2 (2 Points) Let ESL of the challenger Y is 6 years with the associated AW of -6,788.84 baht per year. Should machine X be retained or replaced at the presence? 6.3 (4 Points) Perform one-year later analysis in which no technological change is assumed (Only machine Y is considered to replace machine X in the next 4 years from now). How many years from now that machine X should be retained