If you are interested in a free Lean Six Sigma certification (the "White Belt"), head over to www.sixsigmasociety.org/ ... On a Lean Six Sigma project, the Control Plan helps you institutionalize your new and improved process, so it becomes part of your organization. (You want those positive improvements to last!)
A few important details in the Control Plan include (1) process ownership, (2) process documentation, (3) process monitoring, and (4) process training. Process ownership identifies who is responsible for the process. Process documentation outlines how the process documents (like process flow charts) will be kept current. Process monitoring outlines how and when the process will be measured. (Controls are important for monitoring.) Process training outlines how to keep stakeholders trained on the process.