Consider the following tasks, times, and predecessors for an assembly of set-top cable converter boxes:

Task Element Time

(Minutes)

Preceding Tasks A 1 –

B 1 A C 2 B D 1 B E 3 C, D F 1 A G 1 F H 2 G I 1 E, H Given a cycle time of four minutes, develop two alternative layouts.
Use the longest task time rule and the largest number of following tasks as a secondary criterion.
What is the efficiency of your layouts, assuming the 4-minute cycle time?