Proportions

Chi Square test

One way Anova

Kruskal-Wallis Test

Variation Levene test

Multiple Correlation

Multiple linear Regression

Generate Distribution

Calculations

Filter

Box-Cox transformation

Gauge R&R

Distribution fitting

Graphs

For commersial use

75 EURO

The Control Chart is used in Statistical Precess Control (SPC) to monitor a production process.

The control chart can help

- To prevent that a process is going out of control.
- To determine the range of a process.
- Monitor change in process over time (wear out of production equipment).
- Snapshot of a production period.

Data File

Common Control Chart interpretation (WECO) rules

- A point falls outside the
**UCL**or**LCL**(3 sigma lines). - Two out of three successive points are outside the 2 sigma line (second gray line under or above the mean).
- Four out of five successive points are outside the 1 sigma line (first gray line under or above the mean).
- Eight successive points are on one side of the mean line.

LCL = Mean - 3 x STDEV

- https://en.wikipedia.org/wiki/Control_chart
- https://en.wikipedia.org/wiki/Western_Electric_rules
- http://www.itl.nist.gov/div898/handbook/pmc/section3/pmc31.htm