2)A customer relationship manager decided to track customer complaints as part of his ongoing customer satisfaction improvement program. After collecting data for 3 months, their check sheet appears as follows:

Type of Problem

Frequency

(number of times)

Call went to voice mail 18

Items damaged when received 15

Literature not in the box 7

Parts missing 13

Billing error 6

Unit not working 2

Delivery was late 3

Construct a Pareto chart including the cumulative % frequency. What is the cumulative percentage of the two highest priority issues?