Question

The process is deemed to be out of control, when causes are present.

• A. Root
• B. Special
• C. Random
• D. Common

Answer 1

Answer:

B. Special

The process has common and special causes of variation. Common causes are expected and within control limits, while special causes are due to faults and out of control limits. The upper and lower control limits are predetermined for a product. If the measured value is outside these limits, the process is out of control.