Problem 6-3

A manager wants to assign tasks to workstations as efficiently as possible, and achieve an hourly output of 4 units. The department uses a working time of 56 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	(Click to select) A, G I D, B, C E, H F, A, G
II	(Click to select) E, H I D, B, C D F, A, G
III	(Click to select) F, A, G D, B, C I E, H H
IV	(Click to select) E, H F, A, G H B,E I

b.	In order of greatest positional weight.

Work Station	Tasks
I	(Click to select) C, D F, D D, C F, G G, H
II	(Click to select) F, A, G G, A, B G, H B, C E, H
III	(Click to select) D, C, F B,E F, G C, E A
IV	(Click to select) A H, I B,E H G

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

Efficiency

%