A facility is trying to set up an assembly line and has identified the various tasks and their relationship to each other, as shown in the following table. The managers want to produce 600 units per day, working two 8-hour shifts.

Task	Previous task	Time to complete (sec.)
A	--	20
B	--	30
C	--	25
D	--	10
me	A	55
F	D, B, C	30
GRAMS	me	25
H	F, G	40

(a) Draw a network diagram of precedence relationships.

(b) Calculate the cycle time required per unit in seconds.

(c) Calculate the minimum number of workstations required to produce 600 units per day.

(d) Balance this line using the longer processing time heuristic.

(e) What is the efficiency of the line obtained in part (d)?