Example of using Pareto chart with count data
main topic     interpreting results     session command     see also 

Suppose you work for a company that manufactures motorcycles. You hope to reduce quality costs arising from defective speedometers. During inspection, a certain number of speedometers are rejected, and the types of defects recorded. You enter the name of each defect into a worksheet column called Defects, and the corresponding counts into a column called Counts. You know that you can save the most money by focusing on the defects responsible for most of the rejections. A Pareto chart will help you identify which defects are causing most of your problems.

1    Open the worksheet EXH_QC.MTW.

2    Choose Stat > Quality Tools > Pareto Chart.

3    In Defects or attribute data in, enter Defects. In Frequencies in, enter Counts.

4    Click OK.

Graph window output

Interpreting the results

Focus on improving the number of missing screws because over half of your speedometers are rejected due to this defect.