Protective coatings of plastic and metal are commonly used on manufactured goods to prevent wear and to add beauty to finished products. Coating flaws of various kinds, from small holes to large scratches, not only expose items to possible damage but also are unattractive to consumers. The following c chart monitors the numbers of surface flaws found on certain kitchen appliances. In this chart, 11 appliances are selected each hour, and the total number of coating flaws found on the collection of items is graphed on the chart.

Please see attached file for more information. Thanks!