Simple rules guide innovative, intelligent responses. Comprehensive rules guide rote, routine responses.

If you have unskilled people who work poorly together, no amount of process will save your projects.

Process is not a substitute for skill.

A methodology's weight is a product of its size and ceremony.

Peel back the facade of rigorous methodology projects and ask why the project was successful, and the answer is people.

Simple rules guide innovative, intelligent responses. Comprehensive rules guide rote, routine responses.

If you find that your organization can't make the hard decisions that Scrum demands, then high-risk, uncertain projects have very little probability of success in your organization.