I saw your message on Facebook and will put this on the blog. You were looking for the industry survey that showed why strategic planning was a good thing. I think you are referring to the Evergreen project. That is the most popular reference I see. The best overview of the study is in a book called What Really Works by William Joyce, Nitin Nohria and Bruce Roberson. They had some good evidence that four key elements were responsible for success (strategy, execution, culture and structure). Most of the programs out there only had short term success (like total quality management, six sigma, and a few others).
