Determine the appropriate number of shipping dock doors for a truck dock given the following information. Trucks deliver 580,000 cubic feet of product each day from this facility and the average truck holds 3,300 cubic feet. It takes 3 hours on average to load a truck and the facility works 2 shifts of 8 hours each day.
a- What is the appropriate number of shipping dock doors needed for this operation?
b- If the facility decided to add a third shift (additional 8 hours), how many dock doors would be needed?