The objective is to produce an assistance tool to the GIS design adapted to a development process allowing rapid prototyping in analysis phase ensuring the knowledge capitalization. The Continuous Integration Unified Process method was conceived to allow the development according to the prototyping process during the analysis phase. The knowledge capitalization being a general problem of any development process, the MDA approach was generalized. This new approach, called Software Development Approach Process, was reified into a multimodel artifact, named Software Development Process Model (SDPM) which associates a sub-model at each phase of the development cycle. Panoply of transformations ensures the evolution of the sub-models from analysis to the code. The coherence of the SDPM is ensured by traceability links.