1. Objective
To establish a systematic, standardized, and implementable continuous improvement mechanism. Through continuous optimization of the entire process of plastic packaging bags, including design, raw materials, production processes, quality control, delivery, and service, the goal is to improve product quality stability, production efficiency, and customer satisfaction, reduce defect rates and costs, and enhance the company's market competitiveness.
2. Scope of Application
This procedure applies to all company activities related to plastic packaging bags, including but not limited to:
Raw material procurement (PE, PP, PA, OPP, CPP, composite materials, recycled materials, etc.)
Production processes such as film blowing, bag making, printing, lamination, and slitting
Quality inspection and non-conforming product management
Customer complaints, after-sales feedback, and improvement
Introduction of new products, new processes, and new materials
3. Responsibilities
3.1 Management
Approve continuous improvement policies and annual objectives
Provide resource support (equipment, personnel, training)
Review the implementation effectiveness of major improvement projects
3.2 Quality Management Department
Organize the initiation, analysis, and verification of improvement projects
Collect and analyze quality data (defect rate, customer complaint rate, etc.)
Track the effectiveness of improvement measures
3.3 Production Department
Propose improvement suggestions for production processes
Implement and verify process improvement measures
Provide feedback on problems encountered during implementation
3.4 Purchasing and Warehousing Department
Improve raw material quality and supply stability
Promote continuous improvement among qualified suppliers
3.5 Sales and Customer Service Department
Collect customer feedback, complaints, and market information
Timely communicate customer needs to relevant departments
4. Sources of Continuous Improvement
Continuous improvement information mainly comes from:
Customer complaints and customer satisfaction surveys
Internal quality data analysis (defective products, rework, scrap)
Production abnormalities and equipment failure records
Internal audits, external audits (ISO, SGS, etc.)
New technologies, new materials, and new regulatory requirements
Employee suggestions
5. Continuous Improvement Process
5.1 Problem Identification
Record quality anomalies, customer complaints, and inefficiencies
Clearly define the problem's symptoms, frequency, and scope of impact
5.2 Root Cause Analysis
Use methods such as 5Why and Ishikawa diagrams to analyze the root cause
Evaluate from the aspects of people, machines, materials, methods, environment, and measurement
5.3 Development of Improvement Measures
Develop specific improvement measures targeting the root cause
Clearly define the responsible person, completion time, and performance indicators
5.4 Implementation and Verification
Implement improvement measures according to the plan
Verify the improvement effect through trial production, sampling inspection, or data comparison
5.5 Standardization and Promotion
Document the verified effective improvement measures
Update operating instructions, inspection standards, or management systems
Promote application in relevant products or processes
6. Key Improvement Areas (Plastic Packaging Bags)
6.1 Product Quality
Thickness uniformity
Seal strength and burst resistance
Printing adhesion and color registration stability
Appearance defects (crystal points, black spots, bubbles, creases)
6.2 Production Process
Optimization of film blowing process parameters
Improved bag making speed and stability
Automation and standardization of operations
6.3 Raw Material Management
Raw material batch consistency
Recycled material ratio and performance control
Food-grade and environmental compliance
6.4 Cost and Efficiency
Reduced scrap rate
Reduced rework and repeated operations
Increased equipment utilization rate
7. Data Monitoring and Evaluation
Regularly track key performance indicators (KPIs): defect rate, complaint rate, on-time delivery rate
Conduct monthly/quarterly evaluations of improvement effectiveness
Re-analyze and adjust measures for projects that did not meet targets
8. Training and Awareness Improvement
Regularly train employees on quality awareness and improvement methods
Encourage employee participation in continuous improvement activities
Reward effective improvement suggestions
9. Document and Record Management
Relevant records of continuous improvement should be properly maintained
Including problem record forms, root cause analysis forms, improvement verification reports, etc.
Retention period should be no less than the requirements of the company's quality management system
