Solution :
Given :
The production output per day = 75 units
Production time per day = 24 hours
Therefore, the cycle time is
        =   [tex]$\frac{\text{production time per day}}{\text{outpu}t \text{ per day} }$[/tex]
        [tex]$=\frac{24 \times 60}{75}$[/tex]
       = 19.2 mins
       ≈ 20 minutes
The desired cycle time = 15 minutes per unit
Given the task times of A to E from the table.
Sum of the task times (A to E) = 4 + 3 + 5 + 5 + 3
                         = 20 minutes
Number of workstations needed = (sun of total task times) / (cycle time)
                           [tex]$=\frac{20}{15}$[/tex]
                           = 1.33
                           ≈ 2 work stations