Crazy 8

Crazy 8 is a rapid sketching technique from Google Ventures' Design Sprint methodology. This method structures ideation by constraining each participant to produce 8 visual variations of a solution in 8 minutes (1 minute per sketch). The goal is to move beyond obvious first ideas to explore creative alternatives without censorship or perfectionism.

Method Fundamentals

Strict time constraint (1 minute per idea) forcing rapid, intuitive thinking
Low-fidelity visual format prioritizing concepts over aesthetic execution
Divergent exploration encouraging quantity and diversity over immediate quality
Individual facilitation first, then collective sharing to avoid groupthink

Strategic Benefits

Democratization of ideation: all participants contribute equally regardless of drawing skills
Acceleration of creative process with tangible output in under 15 minutes (including setup)
Neutralization of cognitive biases like anchoring on first ideas or groupthink
Production of alternative volumes facilitating later comparison and hybridization
Revelation of unconventional approaches through time pressure that bypasses self-censorship

Structured Session Example

Context: redesigning a mobile e-commerce checkout flow with 65% abandonment. After clarifying the problem ("How might we reduce friction at payment stage?"), each designer folds an A4 sheet into 8 sections. Timer started, they sketch 8 different solutions: one-click payment, voice recognition, card scanning, smart pre-fill, biometric validation, process gamification, optimized guest mode, integrated digital wallet. Afterwards, all 40 sketches (5 participants) are displayed for dot voting and selection of 3 concepts to prototype.

Operational Implementation

Prepare materials: A4 sheets, thick markers, timer visible to all
Formulate a precise, solution-oriented design question ("How might we...?")
Explain the 8-minute rule (fold sheet into 8 sections, 1 minute = 1 sketch)
Start timer and announce section changes every minute
Observe without intervening - silence fosters concentration
Stop sharply at 8 minutes even if incomplete (constraint is pedagogical)
Organize wall gallery to display all sketches anonymously
Facilitate lightning presentation round (30 seconds per person)
Collectively vote or prioritize concepts to develop

Pro tip

Explicitly forbid digital tools during the exercise. Paper-pencil eliminates perfectionism temptation and accelerates iteration. For distributed teams, use tools like Miro with pre-configured templates and integrated timer, but disable undo to maintain the speed constraint.

Recommended Tools and Environment

Physical materials: Sharpie markers, A3 or A4 sheets, post-its for annotations
Remote tools: Miro, FigJam, Excalidraw with pre-formatted Crazy 8 templates
Visual timers: Time Timer, Pomofocus with presentation mode
Facilitation resources: Design Sprint Kit (Google), AJ&Smart templates, IDEO Method Cards

Advanced Variations

Crazy 8 can be adapted to context: Crazy 6 (6 minutes) for beginners, Crazy 12 to dig deeper, or thematic Crazy 8 where each section explores a specific dimension (mobile/desktop/voice, user A/B/C, etc.). Some teams run multiple successive rounds with evolving constraints to progressively refine.

Measurable Business Impact

In production environments, Crazy 8 reduces alternative generation time by 60% compared to traditional brainstorming, while increasing exploitable ideas volume by 3x. Teams systematically integrating it into design sprints report 40% fewer post-launch iterations thanks to more thorough preliminary exploration. The method also democratizes innovation by giving equal voice to introverted profiles often overshadowed in classic verbal sessions.