The document proposes a new Open Source Maturity Model for Enterprise that addresses shortcomings of existing models. It discusses the basis of maturity models in assessing a product's full feature set, quality, longevity and other factors. It also outlines four existing open source maturity models - from Navica, Atos Origin, Capgemini and Spikesource. The document then proposes a new model that considers enterprise capabilities and competencies in using open source software, rather than just the maturity of individual products. It seeks inputs and comments on the proposed new model.