Which of the following would be a "common" cause of variation?
A) random sources
B) a machine in need of repair
C) an untrained worker
D) a defective raw material

Question

Quizplus · Accepted Answer

Random sources are considered a common cause of variation because they cannot be attributed to a specific factor and are unavoidable in any process. B, C, and D are examples of special causes of variation, which occur due to specific identifiable factors and can be corrected or eliminated to improve process performance.

Which of the Following Would Be a "Common" Cause of Variation