Question

t nc automated stations, and (e) labor efficiency on the line. 4.6 A manual assembly line is being designed for a product whose annual demand is 100,000 units The line will operate 50 wk/yr, 5 shifts/wk, and 8 hr/shift. Work units will be attached to a con- moving conveyor. Work content time is 42.0 min.Assume line efficiency is 0.95, bal- is 0.93 or slightly less, repositioning time is 6 sec, and manning level is 1.4 Determine (a) average hourly production rate to meet demand and (b) number of workers required. (c) If each station on the line is 3 m long, what is the total length of the assembly line? ancing efficiency

Answer 1

$(a) Rp= \frac{100,000}{50*5*8}= \frac{100,000}{2000}= 50 units /hr$

$b) Tc= \frac{60(0.95)}{50}= 1.14 min$

$Ts= 1.14 %u2013 0.10 = 1.04 minutes$ minutes

$w= Min Int \geq 42.0/1.04(0.93) = 43.4 =44 workers$

$(c) n= w/M= 44/1.4 = 31.43 = 32 workstations$

L= 32(3) = 96 m

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