This paper describes an explorative experimentation on the behaviour of developers using a predefined process versus that of those using self-defined ones. The results of the experimentation indicate that it is more advantageous, in terms of minimization of defects and execution effort, to require the developers to tailor the processes they will use rather than to ask them to use a predefined process. Moreover, assistance by the innovation promoter favours the transfer of experience from the organization to the individuals. Finally, quality goals, the availability of suitable tools and specialized training can motivate the use of innovative technologies the organization intends to adopt, even when the developers self-define the processes for their introduction.