For a general introduction to cause mapping, see root-cause-analysis.php.
This cause map analyzes why the lines are so long at an ice cream shop. The primary effect is shown on the left in
blue. The causes are in green and the evidence is in purple. Yellow is used to
show the cause that was the actual problem. Color is not necessary in
cause mapping, but it is helpful to highlight the main effect, the causes, and
You read this chart from left to right and add the words "was caused
by" at each line. For example, "Long lines at the ice cream shop"
by "Too many customers" and/or "Not enough employees" and/or "Not
and/or "Slow service time."
In this cause map, the actual cause was the ice cream machine not being able to
freeze the ice cream mix fast enough to keep up with the number of orders. It
was solved by adding more machines.