the required production rate for a certain product is 50 units/her. it\'s work c
ID: 384135 • Letter: T
Question
the required production rate for a certain product is 50 units/her. it's work content time is 73.5 min. the production line for this product includes 5 automated workstations. because the automated stations are not entirely reliable, the overall line efficiency is expected to be only 88%. all the other stations will have one worker each. it is anticipated that 6% of each cycle will be lost due to worker repositioning. balance delay is expected to be 7%. determine : a. cycle time. b. number of workers. c. number of workstations. d. average manning level on the line. e. labor efficiency on the line (20 points) The required production rate for a certain product is 50 units/hr. Its work content time is 73.5 min. The production line for this product includes 5 automated workstations. Because the automated stations are not entirely reliable, the overall line efficiency is expected to be only 88 %. All of the other stations will have one worker each. It is anticipated that 6 % of each cycle will be lost due the worker repositioning. Balance delay is expected to be 7%. Determine: a. cycle time 2. b. number of workers c. number of workstation d. average manning level on the line e. labor efficiency on the lineExplanation / Answer
a) Cycle time Tc = E/Rp = 60*0.88/50 = 1.056 minutes per unit
b) Ts = Tc - Tr = 1.056 - 1.056*0.06 = 0.99264 minutes
Number of workers, w = Twc / (Eb*Ts) = 73.5 / ((1-7%)*0.99264) = 79.62 ~ 80 workers (considering that work content time of 73.5 is of direct manual labor)
c) Number of workstations, n = 80 + 5 = 85
d) Average manning level, M = w/n = 80/85 = 0.9412
e) Labor efficiency on the line = 1 - 7% = 93%
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