Design Thinking
is a strategy-making process that builds on the world of design combined with understanding human behaviour. Design Thinking is especially useful when addressing ill-defined or tricky problems where both the problem and the solution are unknown at the outset of the design or solution finding exercise.
Design Thinking has developed from the mid-1980s onwards. 
It evolved from several methods focused on improving business, service and design. It seeks to discover or create the ‘Success Zone‘ found in the intersection (where balance exists) between Desirability, Viability and Feasibility.