Grid of boxes
The 6-2-5 method is a great way of generating a lot of solutions for a single problem, allowing the team to gather the building blocks for your project. This exercise should be done with the whole team and the client, regardless of their role on the project. On a single piece of paper, draw/print a grid or just fold the paper so you have a grid of six boxes.
Divide and rule
Divide the whole team into groups consisting of a minimum of three people and give each group a concept or component on which they need to generate ideas. For example, you might ask: “How will the menu work or how can we make sure people get a personalised experience?”
Sketch your ideas
Everybody gets five minutes to generate ideas, creating one idea per box on the grid. The sketch needs to be rough and relatively low in detail but should do enough to convey your concept to the rest of your group. Attempt to generate at least two or three ideas.
Pool your criticisms
Each member within the group presents their sketches to each other after the five minutes has elapsed so keep it short and clear. The group will then provide collective feedback and decides which ideas should be elaborated for each person.
Decide on the best
After a final feedback round, decide what the best ideas from the group are and draw them on larger paper, one idea per sheet. These will be put up on a wall in the room and later, when all sessions are finished, do a voting with all the groups on which ideas are the best. This will give you a great start on the favoured concepts for your project.