©
Factors for Shewhart control charts
  Reproduces tables from e. g. Grant & Leavenworth [1996]. under construction but usable
Largest n, sample size 2 ≤ n ≤ 100 Sample sizes: 2 (1) 25 (5) 100.
References:

• Grant, E. L., R. S. Leavenworth, 1996, "Statistical Quality Control", 7.th ed., McGraw-Hill, New York, NY.

• Wadsworth, Harrison M., Kenneth S. Stephens, A. Blanton Godfrey, 1986, "Modern Methods for Quality Control and Improvement", John Wiley & Sons, New York, NY.

• Guttman, Irwin, S. S. Wilks, and J. Stuart Hunter, 1982, "Introductory Engineering Statistics", 3.rd ed., John Wiley & Sons, Inc., New York, NY.

• Shewhart X-bar and R and S Control Charts, Eng.ing Statistics Handbook, NIST/SEMATECH.

 
Formulas           "SCC": deduction d_2 d_3
Range (R) chart Lims R R-bar D_3, 4
Standard given Lims R σ D_1, 2
  c_4 c_5
Standard deviation (s) chart Lims S s-bar B_3, 4
Standard given Lims S σ B_5, 6
Average (X-bar, "X-bar") chart CL       Lims X-bar R-bar A_2
  cLineXbar-X-2bar.png       LimsXbar-s-bar A_3.png
Standard given LimsSbar-sigma.png A.png
 
 
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Created: 2003-10-21 — Last modified: 2007-10-06