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A four-phase design framework (Discover, Define, Develop, Deliver) for structured problem discovery and solution development.
Double Diamond is a structured four-phase design method (Discover, Define, Develop, Deliver) that guides teams from problem exploration to validated solutions. It separates divergent and convergent thinking to reduce risk and increase clarity. Widely used in product design, it supports stakeholder alignment and iterative learning.
Measures time from start of discover phase to a validated hypothesis.
Counts validated and discarded hypotheses in a cycle.
Ratio of prototypes that lead to production releases.
Description of Double Diamond use in public projects for user-centered design.
Using the model to quickly validate customer needs before development.
Series of workshops using discovery phases to identify new service offerings.
Set up an interdisciplinary core team and align sponsors.
Conduct focused discover activities: interviews, data analysis, observation.
Define workshops to synthesize and prioritize insights.
Develop iterations with prototypes and user tests.
Deliver piloting, monitoring and scaling of successful solutions.