[Zigurd]

Based on the description at the link, Kepner-Tregoe analysis looks like a useful and light framework for eliciting and applying critical thinking in project management. But the key words are "critical thinking." The principles of the agile manifesto when put in practice by people who have domain knowledge and who have aptitude for critical thinking confer on a project a good chance of success.

Those kinds of projects and teams have that edge over others because they have critical thinking on their side. That will benefit them first in seeing that they don't need to add a large, trademarked, expensively trained process around agile, and subsequently in remaining focused on people and code rather than process.