The benefit of a well-defined maturity model is that it gives practitioners a common framework by which to assess their organization, benchmark it against others, and develop a plan for improvement. Often, there is not just one achievement associated with a particular level, but rather a series of capabilities across several dimensions.Search Marketing Maturity Model:
Ion Interactive offered this image as a “open source” project so feel free to offer suggestions. Everyone in search could benefit from a common frame of reference that systematically slices up the complexity of search into a logical, unbiased maturity model.
SEO Maturity Model:
This SEO Maturity Model above from Search Enginuity will give you an idea of what makes up each level or stage of the SEO maturity model. Most importantly, this model will show you what to look for within your organization, and how to make the leap to the proceeding stage.
Web Analytics Maturity Model:
Another way to 'read' Gartner's web analytics maturity model presented by Bill Grassman at eMetrics San Francisco is to analyze the vendors themselves in comparison to what they data they can provide. Google Analytics is a level 1, most of level-2 and some of level-3 type of tool. Omniture will cover you up to most of level 4 if you use Test & Target, Discover, Genesis and imports/exports. Level 5 goes beyond web analytics (think Davenport's "Competing on analytics").
Enjoy:)