Following the steps introduced in the case study, find the balance that minimizes the number of workstations. The assembly line shall stay within the workstation cycle time limitation, and complies with task precedent constraints.

1. 40 products are required each day.
2. Production time per day is 480 minutes.
3. For a manufacturing line, the data below on the task precedence relationships exist (assume the tasks cannot be split).

Task	Task Time (min)	Tasks that must precede
A	10
B	11	A
C	5	B
D	4	B
E	12	A
F	3	C,D
G	7	F
H	11	E
I	3	G,H
SUM	66

4. Find the balance that minimizes the number of workstations, that stays within the workstation cycle time limitation, and that complies with task precedent constraints. check subject