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QC-CALC Historical SPC Analysis Control Charts
Control charts are a valuable process control tool since they provide a signal that a process has assignable cause variation which requires corrective action. A requirement for process control is the elimination of assignable cause variation. Control charts show whether a process is in statistical control or if assignable cause variation is present.

QC-CALC SPC offers the following Control Charts:

Bivariate Analysis
Individual & Moving Range
Individual & Range


Median & Range
Moving Avg. & Range
XBar & Range


XBar & Sigma

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