A fast-food restaurant averages 150 customers per hour. The average processing time per customer is 90 seconds.

Question:

A fast-food restaurant averages 150 customers per hour. The average processing time per customer is 90 seconds.
a. Determine how many cash registers the restaurant should have if it wishes to maintain a 10 percent capacity cushion.
b. Discuss whether you think a 10 percent capacity cushion is appropriate for a fast-food restaurant. What factors would you consider when setting this cushion?