Cause and Effect Diagram — causeEffectDiagram • qcc

Draw a basic cause and effect diagram.

causeEffectDiagram(cause, effect, title,
                   cex = c(1, 0.9, 1), 
                   font = c(1, 3, 2))

Arguments

cause: a list of causes and branches providing descriptive labels (see the example below).
effect: a string label or the effect.
title: a character string specifying the main title. Set title = NULL to remove the title.
cex: a vector of values for the graphical character expansion. The values refer, in order, to branches, causes and effect.
font: a vector of values for the font to use. The values refer, in order, to branches, causes and effect.

References

Montgomery, D.C. (2013) Introduction to Statistical Quality Control, 7th ed. New York: John Wiley & Sons.

Wetherill, G.B. and Brown, D.W. (1991) Statistical Process Control. New York: Chapman & Hall.

Author

Luca Scrucca

Examples

causeEffectDiagram(cause = list(Measurements = c("Micrometers", 
                                                 "Microscopes", 
                                                 "Inspectors"),
                                Materials = c("Alloys", 
                                              "Lubricants", 
                                              "Suppliers"),
                                Personnel = c("Shifts", 
                                              "Supervisors", 
                                              "Training", 
                                              "Operators"),
                                Environment = c("Condensation", 
                                                "Moisture"),
                                Methods = c("Brake",
                                            "Engager", 
                                            "Angle"),
                                Machines = c("Speed", 
                                             "Lathes", 
                                             "Bits", 
                                             "Sockets")),
                   effect = "Surface Flaws")