This chapter is about design, here defined as a process that changes the interactions in a system so that the structure of the system itself is ultimately changed. Thus this chapter is about the capacity of design to bring about a new or an emergent behavior within a system. The present concept of design, and the difficulty arising from its methodology, do not allow for taking control of the various endogenous and exogenous components inherent to the working process in an objective way. Taking into account this drawback, the chapter presents a proposal for a methodology that will be an innovative concept of design. This methodology stems from the Gestalt approach, and is based on the method of measuring the amount of relativistic information in a system. Such an approach lends itself to implementation in the field of website design, with the aim being the development of persuasive tools.