Which of the following statements about causes of variation are true?
I. Assignable variation is random in nature and cannot be eliminated or reduced.
II. Chance variation cannot be completely eliminated unless there are significant methods,techniques,or equipment used in the process.
III. Chance variation usually cannot be corrected,while assignable variation is correctable.
A)I only
B)II only
C)II and III
D)I and III

Question

Which of the following statements about causes of variation are true? 
I. Assignable variation is random in nature and cannot be eliminated or reduced.
II. Chance variation cannot be completely eliminated unless there are significant methods,techniques,or equipment used in the process.
III. Chance variation usually cannot be corrected,while assignable variation is correctable.
A)I only
B)II only
C)II and III
D)I and III

Quizplus · Accepted Answer

Chance variation is random and can only be reduced through the use of controlled methods, techniques, and equipment. However, it cannot be completely eliminated. Assignable variation, on the other hand, is caused by identifiable factors that can be corrected or eliminated, therefore, it is correctable. Hence, statements II and III are true, while statement I is false.

Which of the Following Statements About Causes of Variation Are