This R Package implements the charts as described by Rogers et al. (2004, doi:10.1016/j.jtcvs.2004.03.011). Cusum control charts are devices for monitoring arbitrary processes for a prespecified event. This package and manual uses the term failure instead of event, although any other type of event such as successes could be monitored as well. The processes of our interest are typically surgical procedures.
To create a basic control chart 4 parameters have to be specified:
A cusum chart shows the cumulative sum of failures for a given process. There are two boundaries shown on the graph.
If the cusum curve...
"The natural progression of the graph for an individual or institution with acceptable performance is toward the lower boundary for this method of constructing control limits." (Rogers et. al, 2004)
You can try some functions of the package interactivly in a Shiny App:
require(shiny)
shiny::runGitHub(repo="rcusum",username="meyera", subdir = "inst/rcusum-ShinyApp")
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