Six Sigma Black Belt Exam Prep

Answer: A - The managers should use a P chart.

Key Takeaway: A P chart is a control chart for proportions that shows the proportion of defective or differing items during an inspection of products. To construct a P chart, managers must count the number of defective chips and divide it by the overall number of charts produced. During an inspection, each chip is classified as either ‘defective’ or ‘non-defective’. With a P chart, you can use equal or unequal sample sizes.