uneBetencing.usethsinformation for guestions.5 An assembly operation has a produ

Question

uneBetencing.usethsinformation for guestions.5 An assembly operation has a product layout with 7.5 hours per day to meet planned demand of 900 units per day. Here are the tasks needed to make the product: TASK PREDECESSO. --TIME ises onds) 16 14 25 b,e 15 Considering the information given above, what is the shortest feasible cycle time, regardless of demand 15 A 5 B 15 C. 25 D 30 E 75 16 What is the minimum number of workstations needed to balance the line? A 1 station B. 2 stations C. 3 stations D. 4 stations E 5 stations Using the best eyeball method, balance the line. With the minimum number of workstations what is the efficiency of this line? A 70% B. 86.50% C. 88% 7 D. 90% 93%

Explanation / Answer

Required maximum cycle time = 7.5*3600/900 = 30 sec

(15)

Shortest feasible cycle time will be achieved when all the tasks are assigned separately to the individual station. The task 'd' has the maximum cycle time of 25 sec. So, the shortest cycle time possible is 25 sec.

(16)

Theoretical minimum number of workstations = Total flowtime / cycle time required = (16+14+5+25+6+15)/30 = 2.7. So, at least 3 stations will be needed.

(17)

Efficiency = flowtime / (no. of stations x cycle time) = 81 / (3*30) = 90%

(18)

D.d.

Station Work element Time (seconds) 1 a 16 b 14 2 c 5 d 25 3 e 6 f 15 Total 81

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