Project Management Rigor in Six Sigma Projects

I am looking for examples of where lack of good project management was identified as a reason for failure of a six sigma project or a six sigma deployment. My hypothesis is that the importance of good project management is hugely underrated within the practice of six sigma.

For instance, I am not aware of many BBs/GBs that prepare an elaborate project schedule using a tool such as microsoft project OR BBs/GBs that actively manage project budget OR actively identify and manage project risks OR have a systematic project status reporting beyond the mandatory gates.

Do you think the discipline of project management can add value to the practice of six sigma?

Thanks

AB