I asked Jesse James Garrett about his "Nine Pillars of Successful Web Teams" model. See Jesse's article (on the Adaptive Path website) for the graphical representation of his model, and his brief article on the subject.I highly recommend Jesse's book "The Elements of User Experience", which is a model of clarity.Jesse's website is well worth a visit for his thoughts on information architecture, user experience design, and his visual vocabulary for information architecture and interaction design.(References to books on this webiste are links to Amazon.com - we earn a small commission on any purchases you make on following such links).