Process Improvement EPEF002 - Tutorial School of Engineering TEMASEK POLYTECHNIC Tutorial 2/ Topic 3a - Variable Control Charts Name: Admin No: Q21:_/5 Q22: 10 Q23: _/10 Total Mark: /30 7. Which of the following is not an example of measurement of variations? (A) Range (B) Variance (C) Standard deviation (D) Mean 8. The Upper Control Limit of a variable control chart is typically equivalent to X + (A) lo (B) 20 (C) 30 (D) 60 9. If a process is stable, 99.73% of the plot points should fall within the of the mean limits of each side (A) lo (B) 20 (C) 30 (D) 60 10. If a process is stable, the probability of finding a plot point that is beyond 3o of either side of the mean is (A) 0.27% (B) 0.135% (C) 3% (D) 6% Property of TP. Copyright Page 5 of 37