Question

A producer of windshields decides to monitor the material handling system used in the plant. The producer is concerned about the number of scratches that are appearing on their finished product. The best kind of control chart to use in this case is

A. an R chart.
B. an Upper X overbar chart.
C. a Upper C Subscript pk chart.
D. a p chart.

Answer 1

The best control chart for monitoring the number of scratches on windshields is a p-chart, which tracks the proportion of defective items in a sample.

Step-by-step explanation:

In the scenario where a windshield producer is concerned about the number of scratches appearing on the finished product, the most appropriate control chart to monitor the material handling system is a p-chart. A p-chart is used for quality control purposes to track the proportion of defective items in a sample over time. It is particularly useful when the output is either conforming or nonconforming, such is the case with scratches on windshields. In contrast, an R chart is used for monitoring the range of variability of a process, and an X-bar chart is for tracking the mean of a process over time. The Cpk chart would not be suitable in this context as it is used to measure process capability, rather than the number of defects.