The XYZ company produces all type of office furniture. The “Executive Secretary” is a chair that has been designed using ergonomics to provide comfort during long office hours.  The chair sells for $130.  There are 480 minutes available during the day, and the average daily demand has been 50 chairs.  There are eight tasks;   Task Time (min) Immediate predecessor A 4 - B 7 - C 6 A, B D 5 C E 6 D F 7 E G 8 E I 6 F, G a)  Draw a precedence diagram of this operation b)  What is the cycle time for this operation? c)   What is the theoretical minimum number of workstations? d)  Assign tasks to the workstations e)  What is the idle time per cycle? f)    What is the efficiency of the assembly line?

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
Section: Chapter Questions
Problem 59P
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The XYZ company produces all type of office furniture. The “Executive Secretary” is a chair that has been designed using ergonomics to provide comfort during long office hours.  The chair sells for $130.  There are 480 minutes available during the day, and the average daily demand has been 50 chairs.  There are eight tasks;

 

Task

Time (min)

Immediate predecessor

A

4

-

B

7

-

C

6

A, B

D

5

C

E

6

D

F

7

E

G

8

E

I

6

F, G

a)  Draw a precedence diagram of this operation

b)  What is the cycle time for this operation?

c)   What is the theoretical minimum number of workstations?

d)  Assign tasks to the workstations

e)  What is the idle time per cycle?

f)    What is the efficiency of the assembly line?

 

 

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