HW-01-23-08s

# HW-01-23-08s - IE 131 Solutions for Problems due Jan 23...

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IE 131 Solutions for Problems due Jan 23 (Chs 1 and 2) 1.3 A work group of 20 workers in a certain month produced 8600 units of output working 8 hr/day for 21 days. (a) What is the labor productivity ratio for this month? (b) In the next month, the same worker group produced 8000 units but there were 22 workdays in the month and the size of the work group was reduced to 14 workers. What is the labor productivity ratio for this second month? (c) What is the productivity index using the first month as a base? Solution : (a) LPR = 8600/20(8)(21) = 2.559 units/hr (b) LPR = 8000/14(8)(22) = 3.247 units/hr (c) LPI = 3.247/2.559 = 1.269 = 126.9% 1.5 A farmer's market is considering the addition of bar code scanners at their check-out counters, which would use the UPC marked on all grocery packages. Currently, the check-out clerk keypunches the price of each item into the register during check-out. Observations indicate that an average of 50 items are checked out per customer. The clerk currently takes 7 seconds per item to keypunch the register and move the item along the check-out table. On average it takes 25 seconds to total the bill, accept money from the customer, and make change. It then takes 4 seconds per item for the clerk to bag the customer's order. Finally, about 5 seconds are lost to transition to the next customer. Bar code scanners would eliminate the need to keypunch each price, and the time per item would be reduced to 3 seconds with the bar code scanner. (a) What is

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## This note was uploaded on 02/28/2008 for the course IE 131 taught by Professor Groover during the Spring '08 term at Lehigh University .

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HW-01-23-08s - IE 131 Solutions for Problems due Jan 23...

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