How to evaluate the effect of brainstorming?

The effectiveness of brainstorming is difficult to determine because the process of generating ideas is not linear. There are many factors involved, such as the number of people in the group, how they are assigned to groups, and the quality of their ideas. If you want to be sure that your brainstorming session was effective, you can measure it by how many new ideas each person has contributed or if any of the inputs ended up being used in a real-world project. The impact of working with brainstorms and other techniques might also be seen in employee engagement and happiness.