The main objective of this work is to study the influence of consulting on Fuzzy Front End initiatives (FFE). For this, the main constructs that support the analysis are: FFE, Fuzziness, FFE Management Model, Decision Making Model and Consulting. In order to better understand the phenomenon in question, the FFE, it is evaluated, through a bibliographic review, which are the main enablers in FFE management for the processes of product innovation in companies. In this sense, an FFE management model was elaborated, based on a preexisting model, improved with decision-making models. We used the Case Study methodology and the Extended Case Method, applied to consultancies that execute FFE initiatives in client companies. The research question is: What is the influence of consulting companies in FFE of client's enterprises? A model of idea generation was also designed to understand the genesis of the idea's emergence in FFE initiatives. In the same way, the mapping of the FFE within the science of administration was carried out, showing that the FFE should be understood as the engine of generation and selection of ideas for any type of change, and for this, we used Decision Theory, In order to integrate the FFE with other science subjects. As a result, this work brings a complete view of the FFE, verifying the practical applicability of the enablers in the literature; A management model of interaction dynamics and competence generation between consultancies and client companies; As well as the recognition of the value generated by consultancies in FFE initiatives.