I was going to send you off to the blue bar on the left, but a quick look turned up very little.
A control plan is a plan you put in place to ensure that the savings generated by the project actaully materialize. In the course of a DMAIC project, you have made changes to the process. The control plan attempts to keep those changes in place.
The actual nature of the control plan can vary quite widely depending on the project. In a manufacturing environment, you might implement control charts to track critical variables. In a transactional project, there may well be systems in place that can identify variation.
The key issue is that the control plan is used by the process owner to make sure that the process doesn’t fall back to its pre-project state.
–McD
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