Assembling the subassembly of the landing gear of the Airbus A320 aircraft requires 13 tasks. The tasks, their precedence relationships, and task times as given in the following table. In addition, Airbus has determined that its productive daily operating time is 8 hours and requires 48 units of the subassembly to be assembled per day:

Given this information:

1. Determine the cycle time.

2. Draw a precedence diagram that shows the precedence relationships among tasks for this assembly operation.

3. What is minimum number of workstations required to balance this assembly line?

4. Assign tasks to workstations using the most following tasks rule.

5. Assign tasks to workstations using the ranked positional weight rule.

6. Compute the balance efficiency for both rules.

7. Which rule achieves a better balance?

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Immediate Task Time (in minutes) Tasks Predecessor NONE 8 3 3 D 3 C, E, F Н 3 2 Н 8. I, K, L 10 Total 68