The need for adaptive guidance systems is now recognized for all process of software development. The new needs generated by the mobility context for software development led these guidance systems to be adapted for. This paper deals with the plasticity of guidance systems or their ability to be adapted to specific development contexts. We propose a Y description for adaptive guidance. This description focuses on three dimensions defined by the material platform, the adaptation form and provided guidance service. Each dimension considers several factors to deduce automatically the appropriate guidance service to a current development context.