STILE s. m. [lat. stĭlus „stilo“]. Esercizio di stile, a conceptual project aimed at proposing and analysing one or more stylistic solutions. It serves as inspiration for a future project, adopting a new stylistic direction.

In industrial design, a common stylistic exercises are maquettes. When the exercise involves a working model, it represents a more advanced project phase, approaching a prototype, which includes stylistic exploration among various concepts.