If you are to monitor the number of customers who are not satisfied with your service the following control charts will you use? A. X-bar chart B. p-chart C. Fishbone chart D Pareto chart

B. p-chart

Explanation:

P-chart or graph is a type of control graph used to track the proportion of incompatible units in a sample; The ratio of the sample is defined as the ratio of the number of incompatible units to the sample size, n. The P-graph only covers the type of "successful" / "unsuccessful" control defined by one or more gauges or tests, and effectively applies the specifications to the data before drawing the scheme. Other control charts show the magnitude of the quality characteristics that are being tested and allow them to eliminate problems directly from these charts.

The X-bar chart or graph is a type of Shewhart control chart that can be utilized to track the arithmetic tools of a regular sample at a constant rate n and this bar chart is useful to determine for features that can be measured on a continuous scale, such as weight, temperature, and thickness.

Fishbone chart or diagram is a kind of quality diagram. It is one of the seven quality vehicles and was first used by Kaoru Ishikawa in 1943. It is created to reveal, visualize and work on the reasons that produce results. The general application of the fishbone chart or diagram is to prevent product design and quality errors. All the causes of the problem are caused by some sources of change. The causes are often divided into main categories to identify these sources.

The Pareto chart or curve is a graphic reflection of the Pareto law, shows the cumulative dependence of the distribution of certain resources (accumulated wealth, voting results) or results on a large set (sample) of reasons (for example, on the number of people, the activity of participants).