| A run chart is a chart that
plots values in time order:
The center line is the median
value. A run is defined as one or more consecutive
points on the same side of the median. The
runs are analyzed, patterns that indicate
a 'special cause' are:
- the presence of too
few, or too many, runs for
the number of points
- too many data points in a run
- an unusually long sequence of ascending
or descending data points
- too many points forming a zigzag pattern
Run Charts are similar to
Control Charts, however
there are some important differences. Control
Charts are better for monitoring processes
on an ongoing basis. Run charts are often
better for investigating short term process
improvement opportunities.
Follow the links for more Process
Improvement Tools and Team
Tools.
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