Time Weighted Cumulative Sum Chart (Quality Control Section).
I have put a set of data points through the Time Weighted Cumulative Sum Chart (Quality Control Section).
Why are there two lines in the chart and how are they calculated? What is the y axis scale?
Why does the first line never go below 0 and the lower line never cross above 0?
Cumulative sum chart
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Comments
Hey Dayna,
I suppose this refers to something in JASP, so I will move this discussion there.
Good luck!
Eduard
Dear Dayna,
Sorry about the delay. I'll forward your question to our expert. It does seem as if the image you tried to attach is broken though...
Cheers,
E.J.
Hi Dayna,
You can find more information about the CumSum chart here: https://sixsigmastudyguide.com/cumulative-sum-chart-cusum/. The JASP implementation is based on the QCC package, maybe their documentation also helps you: https://cran.r-project.org/web/packages/qcc/qcc.pdf.
Best,
Jonas