Read the CONTROL Supplementary Document, its in additional materials. As well as CONTROL and the Final Phase of a DMAIC Project. (http://www.six-sigma-material.com/Control.html)
In your initial post, address the following: Can you find any limitations to your Control phase that should be addressed? What are they specifically? What might you need to do to ensure that the process owners in the organization will accept your Control measures? How will the Control phase learning apply to your organization's specific conflict or to the Garden Depot case study?