7A - A to D 250’ 55 27,500 B to C 100’ 10 2,000 B to D...

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A B D C E F G 30 35 65 30 H 35 15 40 25 4 a. b. C = production time per day/required output per day = (450 minutes/day)/360units per day = 1.25 minutes per unit or 75 seconds per unit c. Work station Task Task time Idle time I A C E 30 30 15 0 II F 65 10 III B G 35 40 0 IV D H 35 25 15 d. Efficiency = = = .917 or 91.7%
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A B D C E F G 15 24 6 H 14 11 18 I J K L 7 15 10 12 7 9 5. a. C = production time per day/required output per day = (7.5 hour per day) (3600 seconds per hour)/1000units per day = 27 seconds per unit b. Work station Task Task time Idle time I A C 15 6 6 II B 24 3 III E F 18 7 2 IV I D 14 12 1 V G H J 11 9 7 0 VI K L 15 10 2 c. Efficiency = = = .914 or 91.4%
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A B C D 50' 50' 50' 100' 100' 100' a b d c e f g 70 40 10 h 60 15 30 i j k l 25 25 45 20 50 20 d. Reduce cycle time to 25 ((7.5*3600)/1100 = 24.54 seconds), which requires rebalancing the line or work overtime: (100 units) 27 seconds per unit = 2700 seconds or 45 minutes of overtime. 6. From/to Distances - rectilinear Flow Cost = distance X flow X $2 A to B 100’ 10 $2,000 A to C 200’ 25 10,000
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Unformatted text preview: A to D 250’ 55 27,500 B to C 100’ 10 2,000 B to D 150’ 5 1,500 C to D 50’ 15 1,500 Total $44,500 7. a. b. C = production time per day/required output per day = (7.5 hour per day) (3600 seconds per hour)/300 units per day = 90 seconds per unit c. = 4.56 5 work stations d. Work station Task Task time Idle time I a d 70 10 10 II g j 60 25 5 III c b 45 40 5 IV e h 30 50 10 V f I k l 20 15 20 25 10 e. Efficiency = = = .911 or 91.1% f. Reduce cycle time to 81 seconds per unit. This produces (7.5 hours)(3600 seconds per hour)/81 seconds per units = 333.3 units. Another option is to work 45 minutes overtime (7.5 x 10% = .75 hour or 45 minutes). There are many other options possible that are combinations of these two options....
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This note was uploaded on 10/16/2010 for the course BUS 105 taught by Professor Singh during the Spring '08 term at UC Riverside.

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7A - A to D 250’ 55 27,500 B to C 100’ 10 2,000 B to D...

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