A3 problem solving is a structured problem-solving and continuous improvement approach, first employed at Toyota and often used in lean manufacturing. The 'A3' refers to the international standard size of paper (297mm x 420mm) on which the problem-solving process is documented. The method typically involves a clear, concise presentation of the problem, its analysis, proposed countermeasures, and the implementation plan, allowing for a comprehensive and easily understandable summary of the problem-solving effort. It promotes collaborative problem solving, knowledge sharing, and a standardized approach to addressing issues.
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