Question

​Tailwind, Inc., produces​ high-quality but expensive training shoes for runners. The Tailwind​ shoe, which sells for​...

​Tailwind, Inc., produces​ high-quality but expensive training shoes for runners. The Tailwind​ shoe, which sells for​ $210, contains both​ gas- and​ liquid-filled compartments to provide more stability and better protection against​ knee, foot, and back injuries. Manufacturing the shoes requires 10 separate tasks. There are

400400

minutes available for manufacturing the shoes in the plant each day. Daily demand is

6464.

The information for the tasks is as​ follows:

                                       

Task

Performance

Time​ (mins)

Predecessors

A

11

minus−

B

33

A

C

11

B

D

44

B

E

11

​C, D

F

33

A

G

11

F

H

66

G

I

44

​E, H

J

11

I

​a-b) The correct precedence relationship with one of the possible assignments of tasks using the ​"ranked positioned​ weight" to workstations is shown in

Fig. 1

Fig. 2

Fig. 3

.​c) The efficiency of the assembly line with 5 workstations shown in the figure chosen​ above=

nothing​%

​(enter your response as a percentage rounded to one decimal​ place).​d) The idle time for the assembly line per cycle​ =

nothing

​minute(s) ​(enter your response as a whole​ number).

font size increased by 4 Upper AA

font size increased by 4 Upper GG

font size increased by 4 Upper HH

font size increased by 4 Upper BB

font size increased by 4 Upper EE

font size increased by 4 Upper CC

font size increased by 4 Upper JJ

font size increased by 4 Upper II

font size increased by 4 Fig. 1Fig. 1

font size increased by 4 Upper FF

font size increased by 4 Upper DD

x y graph

font size increased by 4 Upper AA

font size increased by 4 Upper EE

font size increased by 4 Upper HH

font size increased by 4 Upper BB

font size increased by 4 Upper FF

font size increased by 4 Upper CC

font size increased by 4 Upper JJ

font size increased by 4 Upper II

font size increased by 4 Fig. 2Fig. 2

font size increased by 4 Upper GG

font size increased by 4 Upper DD

x y graph

font size increased by 4 Upper AA

font size increased by 4 Upper EE

font size increased by 4 Upper HH

font size increased by 4 Upper BB

font size increased by 4 Upper FF

font size increased by 4 Upper CC

font size increased by 4 Upper JJ

font size increased by 4 Upper II

font size increased by 4 Fig. 3Fig. 3

font size increased by 4 Upper GG

font size increased by 4 Upper DD

x y graph

Enter your answer in each of the answer boxes.

0 0
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Answer #1

The total available time for task = 400 minutes

The demand = 64

Takt time = Total available time/Demand = 400/64 = 6.25 minutes

The precedence diagram is shown below

The total task time is 25 min. The cycle time is 6.25 min. This means that the number of workstations needed is 25/6.25 = 4.

The assignment practice is shown below.

Task avl Task asg WS # Time left Task avl
A A 1 5.25 B, F
B, F F 1 2.25 B, G
B, G B 2 3.25 C, D, G
C, D, G G 1 1.25 C, D, H
C, D, H H 3 0.25 C, D
C, D D 4 2.25 C
C C 1 0.25 E
E E 4 1.25 I
I I 5 2.25 J
J J 2 2.25

The final assignment is shown below

WS Tasks Idle time
1 A, F, G, C 0.25
2 B, J 2.25
3 H 0.25
4 D, E 1.25
5 I 2.25

The efficiency is 25/(5*6.25) = 0.8 or 80%

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