Creativity in design is the capacity to generate and realize ideas that are both novel and appropriate to purpose, context, and constraints. This chapter reviews levels of creativity, core cognitive mechanisms (abduction, analogy, recombination), and enabling conditions across individuals, teams, and organizations. We connect creative practice to evidence-seeking (prototyping) and decision-making (convergence), highlight the role of craftsmanship in making ideas real, and show how AI can widen search and accelerate iteration while human judgment guards meaning, values, and trade-offs.