Six Sigma Calculator
The Six Sigma calculator will compute the standard number of defects per one million opportunities (DPMO) and the process Yield (in percent), based on a given Sigma. You can also compute Sigma from a given DPMO by selecting the Inverse check box. Refer to the description of the Six Sigma Process in the Electronic Manual for a discussion of the computational approach. The Six Sigma Calculator tool will produce results consistent with most designated six sigma tables (e.g., see Harry and Schroeder, 2000; Pyzdek, 2001; Rath and Strong, 2000), and it is ideal to be used for a quick reference or training. The computations are based on a process shift of 1.5 * sigma, and the DPMO and the process Yield are computed based on a one-sided (one-tailed) criterion (see also Six Sigma Process). To perform detailed analyses of expected probabilities for the normal distribution for a wide variety of non-normal distributions, use the general Probability Calculator facilities.
Six Sigma
| Element Name | Description |
|---|---|
| Inverse | Select this option to compute Sigma based on a DPMO (defects per one million opportunities). |
| Plots of yield density | Plots the normal curve associated with the current parameter values (Sigma or DPMO). |
| Plots of yield | Plots the cumulative normal curve associated with the current parameter values (Sigma or DPMO). |
| Sigma | Specifies the value of Sigma. |
| DPMO | Specifies the DPMO value. |