Cross-departmental issues Leaders at all levels of quality management work together to unlock the hierarchical logic and practical codes for quality improvement. It is pointed out that "leadership" is a hierarchical systematic project, covering four levels: top leadership, middle - level leadership... Quality managementQuality strategy A 48 - hour tough battle to reverse the team's thinking and transform quality problems into replicable preventive experiences. In the past 48 hours, the author led the systematic summarization work of the company-wide quality experience inheritance... Poor team cognitionRoot cause thinking