This strategy is based on three main stages; the dreamer, the realist and the critic.
The mindset or disposition you have is always going to be a good starting point. It is essential when we are doing any type of developmental or strategic work.
The approach from Disney is to explore three dispositions - very similar to De Bono’s thinking hats. Here is a bit more info about each one.
The first stage allows the team to share their dream without any restrictions or criticism. This helps to build a pool of creative ideas.
Based on the first stage, the attendees pretend that the dream is possible and start putting plans to achieve it. The plans aims to turn the imaginary ideas into a manageable action plan.
In this session, the team provides a constructive critique for the idea in order to find the weak points and solve it in the final solution.
The article below refers to using a physical place that represents these ideas. I recall another Disney article describing different rooms that a project idea went through to gain feedback.
Changing your physical location is a great way to change your mindset.