This section contains statistical details for Control Chart Builder.
• Statistical Details for XBar and R Charts
• Statistical Details for XBar and S Charts
• Statistical Details for Individual Measurement and Moving Range Charts
• Statistical Details for P, NP, and Laney P′ Charts
• Statistical Details for U, C, and Laney U′ Charts
• Statistical Details for Levey-Jennings Charts
• Statistical Details for Short Run Control Charts
• Statistical Details for G Charts
• Statistical Details for T Charts
• Statistical Details for Three Way Control Charts
Notes:
• Control limits are calculated using a sigma multiplier, K, which is set to 3 by default. To change the default value of K, use the K Sigma option in the red triangle menu or the K Sigma preference in File > Preferences > Platforms > Control Chart Builder.
• For sample sizes up to n = 50, JMP uses control chart constants d2(n) and d3(n) that are defined in Table 2 of Harter (1960). For samples with a sample size greater than 50, JMP uses the control chart constant values for sample size 50 in both the sigma and control limit calculations.