Question: BCT Ltd is a manufacturer of mobile phones. The company is planning for the launch of its new "Grasshopper" state of the art mobile phone but in order to do this, the company must first determine the time it takes to assemble each of the phones allowing for a cycle time of 5 minutes. The following tasks must be performed in order for the launch to be successful.
|
Task
|
Description
|
Predecessor(s)
|
Task Time (seconds)
|
|
A
|
Base component parts
|
-
|
70
|
|
B
|
Assemble parts to base
|
A
|
60
|
|
C
|
Add lens, earpiece, microphone
|
B
|
120
|
|
D
|
Install PC board
|
-
|
60
|
|
E
|
Install key pads
|
C, D
|
240
|
|
F
|
Front and back cover
|
A
|
100
|
|
G
|
Antennae
|
E, F
|
190
|
a. Draw the precedence diagram for the set of tasks.