PSP is a simple game that quickly explores the design space for a particular project. It starts by asking for problem statements written on Post-its. Then, problems are exchanged and the competing teams need to solve the problems. The solutions go back to the first team, who needs to find problems for these solutions. The sequence goes on until the time is over. This game makes it clear that no solution is final and no problem is unsolvable.

PSP is useful to quickly map the design space and then analyze it later.