Table : Task time pizza assembly

Task	Description	Task time (sec)	Preceding task
A	Roll Dough	60	-
B	Add pizza source	30	A
C	Sprinkle cheese	35	B
D	Add sausage	25	C
E	Add Pepperoni	35	C
F	Add Mushrooms	22	C
G	Shrink-wrap pizza	15	D,E,F
H	Add label	23	G
Total time		245 sec

Table above shows the task time and precedence relationships for a pizza assembly. The product time per day is 8 hours and the production schedule requires 300 pizzas per day by the assembly time.

1. Draw the precedence diagram of the operation.
2. Determine the cycle time of the line.
3. Calculate the minimum number of workstations for this operation.
4. Construct the line layout of the operations following by rules below:
5. Longest task time rule.
6. Number of following rules.
7. Compute the resulting efficiency and balance of delay percentages.
8. If a worker is paid RM35 per day, compute the cost of idleness per week (assuming a work 6-day week).