qicharts2: Quality Improvement Charts for R
Jacob Anhøj · The Journal of Open Source Software · 2018
qicharts2 is an R package for making statistical process control (SPC) charts for continuous quality improvement.SPC charts are point-and-line graphs showing a measure over time and employing statistical tests for identification of non-random variation, e.g.quality improvement or degradation.Central to SPC is the understanding of process variation over time.