This article approaches the problem of methods’ inadequacy to assist complex cognitive tasks in information technology systems projects. Authors like MARMARAS and PAVARD (1999), among others, introduce these methods and present proposals for an approach to the problem recognizing the need of assisting complex cognitive tasks. Using the Curve–S metaphor as learning curve, this article discusses the need to identify the limit imposed by technological apprenticeship, as well as the search, in other sciences, for substitutive technology, before reaching the final limit in the Research and Development process, P&D. From the conceptual design on, it points to the action of multiple tools as a priority. It also highlights the fact that, in this field, isolated tools are not enough to achieve complete assistance: multiple tools are demanded to be employed in each stage of the design.