1. correlation diagram method-TQM implementation, policy management, quality control improvement, production mode, production management improvement II. KJ method-development, TQM implementation, QCC implementation, quality improvement 3. System diagram method-development, quality assurance and quality improvement. Matrix method-development, quality improvement and quality assurance. Engineering analysis 6. PDPC method-planning, quality assurance, safety management, trial evaluation, production management improvement and equipment management improvement 7. Arrow Diagram-Quality Design, Development and Quality Improvement