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What is the difference between 'Control Limits', 'Calculated Control Limits' and 'Historical Control Limits'?
Article Details

Last Updated
15th of January, 2014

Applies to
WinSPC 8.2, WinSPC 8.3

Introduction:
The chart component within Variable Analyzer and Report Templates allow for many different visualizations of your data, most of which can be customized via Chart Color Schemes. From within the properties of the Chart Color Schemes you can make visible 'Control Limits' and/or 'Historical Control Limits'

chart properties.png
'Control Limits' in the Chart Color Scheme indicates the 'Calculated Control Limits' that are actually calculated when the Data Set, Variable Analyzer or chart within a Report is generated. Based on the enabled data filters and options you select in analysis 

By default, Calculated Control Limits appear as blue solid line(s). 

'Historical Control Limits' are the limits that the operators actually saw when they collected data in Data Collection Mode. 

By default, Historical Control Limits appear as blue dashed line(s).  


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