Exam 3: Statistical Quality Control

Which of the following control charts is based on the number of defects within a sample?

Process control is achieved by taking periodic samples from a process and plotting the sample points on a chart to determine if the process is within control limits.

Statistical process control is a tool used to monitor and improve quality.

When calculating control limits for a process,the number of standard deviations Z value)is typically six.

A pattern test can identify an out-of-control process even if all sample points are within control limits.

A p-chart is used to monitor the proportion defective in the output of a process.

What is the process capability ratio and how is it calculated?

The individual that detects special cause variation in a process is not allowed to diagnose the root cause and correct it.

The popularity of Excel and other data analysis software has been a major factor in the increased use of statistical process control.

If a pattern is evident in the points plotted on a control chart,the points are always considered evidence that the process is in control.

One goal of statistical process control is to prevent a process from producing items that have to be scrapped or reworked.