Reverse Double Diamond

The Reverse Double Diamond is a variation that starts with a broad testing of potential solutions before defining the problem in detail. This approach is particularly useful in situations where the problem is not well-defined, or where innovative solutions are required to redefine the problem space itself.

Further Reading

The reverse double diamond — Dragan BabićDragan Babić

Double Diamond Is Not How Most Companies Work - Smart Interface Design PatternsSmart Interface Design Patterns, with Vitaly Friedman