The SIL method, which stands for the German term 'Sukzessive Integrationsmethode von Lösungselementen' (method of successive integration of solution elements), was developed at the Battle Institute in Frankfurt. The process begins with individual ideation in silence. Two members then read their ideas out loud, and the team is tasked with integrating the two ideas into a coherent composite concept. A third person reads his idea and the group fuses it with the previous mixed concept. This cycle continues until an evolved and robust solution is formed.