Devising theatre is a collaborative approach to creating original performances without a pre-written script. It involves ensemble-based work, incorporating multiple art forms and emphasizing experimentation. This method allows for greater artistic freedom and often addresses contemporary social issues. Key players in devising theatre include Jerzy Grotowski, Augusto Boal, and companies like The Performance Group and Frantic Assembly. The process typically begins with a shared theme, involving improvisation, workshops, and exercises to generate material and ideas for the piece.