A3

A3 refers to a problem-solving approach or a specific size of a report used mainly in Lean management and continuous improvement. It emphasizes clear communication by focusing on key information—such as the issue, analysis, countermeasures, and results—on a single A3-sized sheet of paper (about 11x17 inches). This method encourages thorough thinking, structured analysis, and effective collaboration to address challenges efficiently. Ultimately, A3 promotes transparency, accountability, and continuous learning within organizations by making problem-solving processes accessible and straightforward.