Provides a method for visualizing the effects that one or more inputs (factors) have on the mean and variation of a process and on making subjective decisions about the process.
|When to Use||Purpose|
|Mid-project||Helps to assess which inputs exert influence on either the mean or the variation of the process output.|
|Mid-project||Good tool for communicating the effects of process inputs on the process output to project stakeholders.|
Continuous Y, from one to four X-variables called factors (numeric or categorical). If factors are numeric, they must be controlled at specific levels.
If you have discrete numeric data from which you can obtain every equally spaced value and you have measured at least 10 possible values, you can evaluate these data as if they are continuous.