Brainstorming is the transition from "What is?" to "What if?" in Jeanne Liedtka's 15-step Design Thinking methodology. This 16-minute video describes the goals of brainstorming in the design thinking context. Also included in the video are a series of best practices for effective idea generation. This video is part of the Design Thinking video series meant to accompany any one of three cases (Arena Industries [UVA-S-0240], Trenton State College [UVA-S-0241], or Great Lakes [UVA-S-0248]) that explore the design thinking approach to innovative problem solving.