The Building State Capability (BSC) program at Harvard's Center for International Development (CID) researches strategies and tactics to build the capability of public organizations to implement policies and programs. BSC has developed the Problem Driven Iterative Adaptation (PDIA), a process of facilitated emergence which focuses on problems (not solutions) and follows a step by step process (not a rigid plan) that allows for flexible learning and adaptation. PDIA is a learning by doing approach that helps organizations develop the capability to solve complex problems while they are actually solving such problems.