One of my favourite ways of working is the double diamond model approach. I’ve been using it a lot recently as a way of exploring ideas and then converging on tackling one problem definition https://mgearon.com/ux/double-diamond-model/
4 phases of the Double Diamond Model

The British Design council in 2004 came up with the idea of the double diamond design model. The purpose of the model is to help creatives follow a process

Michael Gearon