Modern industries operate under very selective conditions, as all the competitors develop
efficient and effective products. For this reason, innovation is one of the main ways to lead
the market. There are some methods and tools to analytically help designers towards the
generation of new ideas. TRIZ is one of these methods. But all of this is not enough to
generate a success product, because a fundamental actor is still underestimated, the final
user of the product under development. To satisfy the user's requirements, designers and
developers must keep into consideration also the Interaction Design methods. Unfortunately,
these methods are not as structured as the TRIZ theory and very often it is very difficult to
apply them in an effective way. For all of this, it appears quite reasonable to think about the
development of innovative, easy-to-use products, as helped by a synergy between the
Interaction Design and the TRIZ theories. After some highlights about analogies and
differences of these two domains, this paper develops the basis for the generation of a new
integrated analytical method able to suggest a collection of guidelines for the definition and
implementation of engineering requirements. Then this method is described, and the
summary of a case study performed to validate the method closes the paper.
