Answer:
a. Before the change in work rules, the company's productivity per day
= 550 packing boxes / 20 hours = 27.5 packing boxes per hour
b. Based on the changes made, the percent increase in productivity
productivity after the change = 700 packing boxes / 24 hours = 29.17 packing boxes per hour
productivity change = (29.17 - 27.5) / 27.5 = 6.07%
c. If production is increased to boxes per day (with the three 8-hour shifts), the new productivity equals
700 packing boxes per day (prior productivity of 550 packing boxes per day, which represents a 27.27% increase)
productivity = output / unit of time