Answer:
75%
Step-by-step explanation:
Given that,
No. of workstations used = 10
Target output for an 8 hour workday = 120 bags
Sum of the task times = 30 minutes/bag
Cycle time = 4 minutes/bag
Assembly-line efficiency:
= Sum of the task times ÷ (Number of work stations × Cycle time)
= 30 ÷ (10 × 4 )
= 30 ÷ 40
= 0.75
= 75%
Therefore, The assembly-line efficiency is 75%.