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Control Charts

features

Download Excel 2007 Workbook with Instructions

Download Excel 2003 Workbook with Instructions

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Control Charts are used for identifying if a process is in control or not. Quantum XL supports control charts for both variables and attributes data.

 

Variables data in subgroups

XbarR and XbarS charts are used when you have continuous measurement data.

  • XbarR chart: Creates two control charts. The first chart (Xbar chart) is a chart for subgroup means (averages). The second chart is the R chart, which displays subgroup ranges.

  • XbarS chart: Creates two control charts. The first chart (Xbar chart) is a chart for subgroup means (averages). The second chart is the S chart, which displays subgroup standard deviation.

Variables data for individuals

IMR chart is used when you have continuous measurement data, for individuals data.

  • IMR chart: Creates two control charts. The first chart (Individuals chart) plots each point from a dataset. The second chart is the Moving Range chart.

Attribute data

Attribute charts are used for the data that comes from pass/fail inspection, like counts of defects.

  • p Chart: A control chart for defectives. Displays the proportion of defectives in each subgroup.
  • np Chart: A control chart for defectives. Displays the number of defectives in each subgroup.
  • c Chart: A control chart for defects. Displays the number of defects in each subgroup.
  • u Chart: A control chart for defects. Displays the number of defects per unit sampled in each subgroup.

Features:

  • Scrolling Control Charts: After the Control Chart has been created, you can customize how many data points are displayed and whether to display Zone Lines and Out-of-Control points or not. This is done using on-sheet controls, so Quantum XL doesn’t need to be running in order to scroll a control chart.
  • Custom out-of-control checking.
  • Add new data and update control chart.
  • Control limits based on original data, all the data (including added data points), first N rows.