Provides a complete set of performance measures including standard Six Sigma statistics (for example, long-term Z and DPMO), "traditional" capability measures (for example, Pp and Ppk), and observed and expected defect rates.
The Capability Analysis: Nonnormal report does not include any means for assessing process stability (for example, control charts), nor does it include any means for determining if an adequate amount of data has been collected.
You have the option of choosing from 13 different distributions or using a Johnson Transformation for cases where none of the distributions provide an adequate fit to the data.
|When to Use||Purpose|
|Start of project||Perform a baseline capability analysis on the process to determine its performance at the start of the project. A baseline analysis helps you set improvement goals for the project.|
|Mid-project||Perform a confirmation capability analysis after improvements have been implemented to confirm that the process performs as predicted.|
|End of project||Perform a capability analysis after implementing controls to obtain a final assessment of process capability, and also to determine whether the improvement goals of the project were attained.|
Continuous Y (output), at least one specification.