Double Diamond is the name of a design process model popularized by the British Design Council in 2005, and adapted from the divergence-convergence model proposed in 1996 by Hungarian-American linguist Béla H. Bánáthy. The two diamonds represent a process of exploring an issue more widely or deeply (divergent thinking) and then taking focused action (convergent thinking). It suggests that the design process should have four phases:
- Discover: Understand the issue rather than merely assuming it. It involves speaking to and spending time with people who are affected by the issues.
- Define: The insight gathered from the discovery phase can help to define the challenge in a different way.
- Develop: Give different answers to the clearly defined problem, seeking inspiration from elsewhere and co-designing with a range of different people.
- Deliver: Involves testing out different solutions at small-scale, rejecting those that will not work and improving the ones that will.
- "Eleven lessons. A study of the design process" (PDF). Design Council. Retrieved 2 December 2022.
- Banathy, Bela H. (1996). Designing Social Systems in a Changing World. Springer US. p. XV, 372. ISBN 978-0-306-45251-2.
- Möller, Ola (9 January 2015). "The Double Diamond". MethodKit Stories. Retrieved 3 September 2019.
- "What is the framework for innovation? Design Council's evolved Double Diamond". Design Council. Retrieved 6 April 2021.