Answer :
The company should have 4 workstations.
What is task or process time?
Process lag time (PLT), often known as Little's Law, is the amount of time it takes an item to complete a process from the moment it enters until it exits. The processing time at each workstation is added to any waiting or queue time that may have occurred.
Total units to be produced in a day = 400
Time taken to produce 1 unit = 6 minutes
Total minutes in a day = 720
Break time spread in a day = 60
Net minutes in a day for production = 660
One unit/day = net minutes for production/ Total time taken to produce 1 unit
= 660/6 = 110
Therefore one workstation can produce 110 units in day
So to complete 400 units in a day, we need 3.6, i.e. 4 workstations
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