# Control Limit Calculations Form

The Control Limit Calculation Form calculates control limits for numerous control charts, each with a number of different calculation methods.

The Variables charts, X-bar, Median, X, R, s, and s^{2}, have a number of different options which can be used to determine the process variation used to determine the control limits. These options include the average and median range, average and median standard deviation, average variance, moving range of the means, standard deviation of the means, or a known standard deviation. Variables charts also provide estimates of the population standard deviation, sigma.

The Attributes control charts have approximate and exact limit calculations as an option. The exact limits for the p and np charts are based on the Binomial Distribution. The exact limits for the c and u charts are based on the Poisson Distribution.

The number of standard errors for each chart may also be modified. The default is 3.

### Menu

**File**provides the ability__Save__or Print the output, or return to the__Main Form__.**Edit**allows__Editing Output Text__by cutting, copying, pasting, and undoing entry.**View**provides the ability to enlarge/reduce the Form size for easier viewing.**Help**provides access to this Website.

### Speed Buttons

- These buttons provide quick access to the following tasks.
- Returns to last Form or the
__Main Form__. -
__Saves__the output to a file. - Prints the Text.
- Copies Selection to the clipboard.
- Pastes Text from the clipboard
- Enlarges/Reduces Form size for easier viewing.
- Brings up the
__Main Form__. - Brings up the Help file.
- Hides the form.

### X-bar Tab

### Median Tab

### X Tab

### R Tab

### s Tab

^{2}Tab

^{2}-chart calculations.

### p Tab

### np Tab

### c Tab

### u Tab

### Centerline

### Statistic Value

*Statistic Used*option.