Fast Finish is an ideation technique that presents participants with half-completed design concepts, scenarios, or product sketches and asks them to complete them as quickly as possible. The starting material (a partially drawn screen, a service scenario with a missing ending, a product with an undefined feature set) provides just enough structure to orient thinking without constraining it. The resulting completions reveal the participant's mental model of what the design should be, often more directly than any interview question could.
Fast Finish
Completing half-finished designs to reveal what users actually want
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Designers Academy
20 January 2026 · 3 min read
DesignMethods
In brief
Fast Finish is an ideation technique where participants complete half-finished design concepts, scenarios, or product sketches to reveal their mental models and true user desires without bias.
