Over the past decade, the affordable and supportive housing industries have become extremely sophisticated not only in financing and building new housing, but also in terms of the range of models that have been created. As these industries continue to grow and mature, they must continue to evolve to meet the challenges faced by new communities of people in need of housing. Accordingly, they must become adept at designing and retooling existing resources to create models of housing that effectively meet the unique housing needs of individuals with special needs and their families. While in a few cases (supportive housing models) housing providers will directly offer services, their role will generally be to coordinate and convene existing community services to assist those living in their properties. Some of the range of housing options that involve service coordination or integration, including supportive housing and re-entry housing, are discussed in Policy Statement 19, Housing.