Double Diamond
Diverge twice, converge twice — the diamond of design.
UK Design Council model with two diamonds. First diamond = problem: Discover (diverge — research, ethnography, context mapping) → Define (converge — frame a single problem). Second diamond = solution: Develop (diverge — concepts, prototypes, co-creation) → Deliver (converge — select, validate, implement). Between diamonds sits the 'well-framed problem' — the biggest lever in the whole process.
Service design, innovation, strategy workshops, defining a new category, customer-experience redesign, or when the team jumps to solutions without understanding the problem.
Don't skip phases. In divergence don't judge — generate quantity. In convergence judge and reduce. Between diamonds write the problem in one sentence: 'How might we…?' Without it the second diamond has no compass. Most teams fail in the first diamond — they pin down 'the' problem too early.
Related frameworks
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