Operations management Quesion

A manager wants to assign tasks to workstations as efficiently as possible, and achieve an hourly output of 3 units. The department uses a working time of 54 minutes per hour. Assign the tasks shown in the accompanying precedence diagram (times are in minutes) to workstations using the following rules:

a.

In order of most following tasks. Tiebreaker: greatest positional weight.

Work Station

             Tasks      

I

II

III

IV

b.

In order of greatest positional weight.

Work Station

         Tasks

1

2

3

4

c.

What is the efficiency? (Omit the "%" sign in your response. Round your answer to 2 decimal places.)

   Efficiency

 %