Discussed SPC, variable Gauge R&R, Repeatability and Reproducibility with Examples calculation of variable Gauge R&R, Bias, Linearity and Stability with examples.

1. Measurement System
Analysis (MSA)
MEC395
MEASUREMENT AND QUALITY
ASSURANCE WORKSHOP
Dr. Loveleen Kumar Bhagi
Associate Professor
School of Mechanical Engineering
LPU
1

2. Precision and Accuracy

3. What is SPC ? Why SPC?

4. Type of Data

5. Central tendency and Dispersion of Data

6. Central tendency and Dispersion of Data

7. Central tendency and Dispersion of Data

8. Central tendency and Dispersion of Data

9. Measure of dispersion

10. Measure of dispersion

11. Measure of dispersion
A standard deviation (or σ) is a measure
of how dispersed the data is in relation
to the mean. Low standard deviation
means data are clustered around the
mean, and high standard deviation
indicates data are more spread out.

12. Measure of dispersion

13. Measure of dispersion
https://www150.statcan.gc.ca/n1/edu/powe
r-pouvoir/ch12/5214891-eng.htm

14. Variation

15. Source of Variation

16. Practical for Repeatability and
Reproducibility

17. Calculation of variable Gauge R&R

18. Calculation of variable Gauge R&R

19. Calculation of variable Gauge R&R

20. Calculation of variable Gauge R&R

21. Calculation of variable Gauge R&R

22. Calculation of variable Gauge R&R

23. Calculation of variable Gauge R&R
n = No.of parts and r = No.of
Trials

24. Calculation of variable Gauge R&R

25. Calculation of variable Gauge R&R

26. Calculation of variable Gauge R&R

27. Calculation of variable Gauge R&R

28. Calculation of variable Gauge R&R

29. Calculation of variable Gauge R&R

30. Calculation of variable Gauge R&R

31. To check Bias, Linearity and
Stability with Micrometer and Ring
Gauge

32. Bias, Stability and Linearity

33. Bias, Stability and Linearity

34. Bias, Stability and Linearity

35. Bias, Stability and Linearity

36. Bias, Stability and Linearity
Bias is the difference between the observed
average value and the true or reference
value on the same characteristic on the
same/identical part.
Bias often referred as ‘Accuracy’
Bias: Observed Average – Reference Value
% Bias : Bias/ P.V (or tolerance ) x 100

37. Bias, Stability and Linearity

38. Bias, Stability and Linearity

39. Bias, Stability and Linearity

40. Bias, Stability and Linearity

41. Bias, Stability and Linearity

42. Bias, Stability and Linearity

43. Bias, Stability and Linearity

44. Bias, Stability and Linearity

45. Bias, Stability and Linearity

46. Bias, Stability and Linearity