計画・実行・評価・改善（PDCAサイクル）

The Plan–Do–Check–Act (PDCA) cycle is a systematic framework used in product design and innovation to facilitate continuous improvement and iterative development. It involves four key phases: planning the objectives and processes, executing the plan, evaluating the results against the expected outcomes, and implementing necessary adjustments to enhance performance. This cyclical approach promotes a culture of learning and adaptation, ensuring that products evolve in response to user feedback and changing market conditions.