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Multi-Vari¶

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QXL Stat Tools Tab > Problem Solving >Multi-Vari Charts

Multi-Vari analysis graphically represents different sources of process variation. There are three families of process variation that can be observed on Multi-Vari charts:

Positional (within a subgroup)
Cyclical (between groups)
Temporal (over time)

Multi-Vari elements¶

Multi-Vari

Step #1: Select data source for Multi-Vari.¶

Data for the Multi-Vari analysis can come from an Excel spreadsheet or SQL data source. See source data formats. Using the Group-By option will allow you to create multiple charts and observe the Temporal variation.

Step #2: Multi-Vari options¶

Select which elements you want to display on a Multi-Vari chart.

Multi-Vari UI

You can choose to show the dataset minimum, maximum, and range line; display the markers for the Mean; and connect the Mean markers with a dash line. You can also display the Group Mean, Grand Mean, and all data points. Selecting 'Show standard deviation' will create an additional chart below the Multi-Vari chart.

You can also choose whether to use dataset Mean or Median.

Update¶

Multi-Vari chart is updatable. After you create a Multi-Vari analysis, you can change its settings, change the data source, or add new data to the data source and simply update chart.

UpdateMulti-Vari chart: Quantum XL > Problem Solving > Multi-Vari Charts >Update
Change settings: Quantum XL > Problem Solving >Multi-Vari Charts >Modify Chart