© 2004 Cayman Business
Systems
Rev:
Pre-G3 - Rendered Thursday,
February 12, 2004
3.ACT
Decide on appropriate
action and implement it.
Identify on the control
chart
The cause of the problem
The action taken
As far as
possible,eliminate the possibility of the special cause happening again.
4. CONTINUE MONITORING
Plotting should continue against the existing limits
The effects of the process
intervention should become visible. If not, it should be investigated.
Where control chart
analysis highlights an improvement in performance, the effect should be researched in order
that:
Its operation can become integral to the process
Its application can be applied to other processes where
appropriate
Control limits should be
recalculated when out of control periods for which special causes have been found have been
eliminated from the process.
The control limits are
recalculated excluding the data plotted for the
out of control period. A suitable
sample size is also necessary.
On completion of the
recalculation, you will need to check that all plots lie within the new limits