The manager of Perrotti’s Pizza collects data concerning customer complaints about delivery. Pizza arrives late, or the wrong pizza is delivered.
Problem Frequency
Topping stuck to box lid..............17
Pizza arrives late ...................35
Wrong topping or combination.........9
Wrong style of crust..............6
Wrong size.................4
Pizza is partially eaten..............3
Pizza never arrives..............6

a. Use a Pareto chart to identify the “vital few” delivery problems.
b. Use a cause and effect diagram to identify potential causes of late pizza delivery.