An assembly line is to be designed to operate 8 hours per day and supply steady demand of 480 units per day. Below are the tasks and their performance times:

Task	Preceding Task	Activity Time (Seconds)	Task	Preceding Task	Activity Time (Seconds)
A	-	28	G	F	23
B	-	13	H	F	25
C	B	35	I	G	37
D	A	11	J	G, H	11
E	C	20	K	I, J	27
F	D, E	6	Total		236

1. Draw the precedence diagram.
2. Find the required cycle time for meeting the daily demand.
3. What is the theoretical minimum number of workstations? Assign tasks to each workstation. Show your task assignment on the diagram shown in part (a).
4. What is the efficiency of your line balancing as shown in part (c)?
5. What would you do if the demand decreases by 50% to 240 units per day?