The solution TIER is a development to have quickly web applications small and medium-sized on a standard functionality commensurate with the pattern CRUD (basic data maintenance, management of licences, conservation of historical data, regular searches, etc.). a model of data that meets a pre-defined criteria, implementation is capable of generating the basic logic necessary to a standard functionality in management. The application is parametrizable to extend this basic functionality with criteria of filtrate of roles, behaviour associated to fields, etc.