A manager must decide which type of machine to buy, A, B, or C.
Machine costs (per individual machine) are as follows:
Machine | Cost | |
A | $ | 60,000 |
B | $ | 50,000 |
C | $ | 60,000 |
Product forecasts and processing times on the machines are as
follows:
PROCCESSING TIME PER UNIT (minutes) | |||||
Product |
Annual Demand |
A | B | C | |
1 | 15,000 | 2 | 4 | 2 | |
2 | 25,000 | 6 | 2 | 3 | |
3 | 15,000 | 3 | 5 | 5 | |
4 | 20,000 | 3 | 4 | 2 | |
a. Assume that only purchasing costs are being
considered. Compute the total processing time required for each
machine type to meet demand, how many of each machine type would be
needed, and the resulting total purchasing cost for each machine
type. The machines will operate 8 hours a day, 220 days a year.
(Enter total processing times as whole numbers. Round up
machine quantities to the next higher whole number. Compute total
purchasing costs using these rounded machine quantities. Enter the
resulting total purchasing cost as a whole number. Omit the "$"
sign.)
Total processing time in minutes per machine: | |
A | |
B | |
C | |
Number of each machine needed and total purchasing cost | ||
A | $ | |
B | $ | |
C | $ | |
b. Consider this additional information: The
machines differ in terms of hourly operating costs: The A machines
have an hourly operating cost of $14 each, B machines have an
hourly operating cost of $12 each, and C machines have an hourly
operating cost of $14 each. What would be the total cost associated
with each machine option, including both the initial purchasing
cost and the annual operating cost incurred to satisfy
demand?(Use rounded machine quantities from Part a. Do not
round any other intermediate calculations. Round your final answers
to the nearest whole number. Omit the "$" sign.)
Total cost for each machine | |
A | |
B | |
C |
a.
processing time required in machine A = 2*15000 + 6*25000 +
3*15000 + 3*20000 = 285000
processing time required in machine B = 4*15000 + 2*25000 + 5*15000
+ 4*20000 = 265000
processing time required in machine C = 2*15000 + 3*25000 + 5*15000
+ 2*20000 = 220000
Total available time = 220*8*60 minutes = 105600 minutes
No of Machine A required = 285000/105600 = 2.698863636 = 3 (Rounded to next whole number)
No of Machine B required = 265000/105600 = 2.509469697 = 3 (Rounded to next whole number)
No of Machine C required = 220000/105600 = 2.083333333 = 3 (Rounded to next whole number)
according to fixed cost,
Total fixed cost for machine A = 60,000*3 = 180,000
Total fixed cost for machine B =50,000*3 = 150,000
Total fixed cost for machine C = 60,000*3 = 180,000
So, based on annual fixed cost 2 machine B will cost least to satisfy the demand
b.
Hourly operating time required in machine A = 285000/60 = 4750
So operating cost = 4750*14 = 66500
Total cost = fixed cost + operating cost = 180000+66500 = 246500
Hourly operating time required in machine B = 265000/60 = 4416.666667
So operating cost = 4416.666667*12 = 53000
Total cost = fixed cost + operating cost = 150,000+53000 = 203000
Hourly operating time required in machine C = 220000/60 =
3666.666667
So operating cost = 3666.666667*14 = 51333.33334
Total cost = fixed cost + operating cost = 180000+51333.33334 = 231333.3333 = 231333 (Rounded to nearest whole number)
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