Which of the following statements about special causes of variation is/are FALSE?
A)It is the type of variation that we would hope to be able to detect so that it could be eliminated.
B)It is variation that is added to common cause variation because of unpredictable disturbances that affect the normal functioning of the process from time to time.
C)It is variation that is inherent to the process because of the many small causes that are always present in a process.
D)Control charts are designed to give a signal when special causes of variation are present,so that action can be taken to find and remove the cause of the disturbance.
E)As a result of a special cause,the result may be that the process mean,the process standard deviation,or both may have changed.

Question

Quizplus · Accepted Answer

Statement C is false because special causes of variation are not inherent to the process and are not always present. They arise due to unpredictable disturbances that affect the normal functioning of the process from time to time. Common causes of variation, on the other hand, are inherent to the process and can be managed through process improvement efforts.

Which of the Following Statements About Special Causes of Variation