Control Chart Limits Calculator (X-bar R, X-bar S, Individuals)
Control Chart Limits Calculator (X-bar R, X-bar S, Individuals): a planned Super Calculator tool. Stub page while the tool and its worked example are prepared.
Control Chart Limits Calculator (X-bar R, X-bar S, Individuals) is a planned calculator in the engineering section of Super Calculator, covering quality and reliability engineering.
What this calculator will compute
Inputs: subgroup data or subgroup means and ranges, subgroup size, chart type and number of subgroups.
Outputs: center line, upper and lower control limits for both charts, out-of-control points and Western Electric rule violations.
Formula, recorded as scope and not yet verified against a primary source: X-bar R chart: control limits Xbarbar plus or minus A2Rbar, with range limits D3Rbar and D4Rbar. X-bar S chart uses A3, B3 and B4. Individuals and moving range charts use 2.66MRbar. Constants are the standard AIAG and ASTM control chart factors indexed by subgroup size.
Status
This page is a stub. The calculator is not built, no figure on this page has been verified against the authority that sets it, and nothing here should be used to make a decision. The page exists so that the site structure is complete and so that articles can link this concept on first mention.
The stub carries noindex, nofollow and is excluded from the sitemap.