During Production Inspection (DUPRO / DPI)

Professional Mid-Production Quality Inspection Services 

During Production Inspection (DUPRO), also known as Mid-Production Inspection or DPI, is a core third-party Product Inspection Service for mass production orders in international trade. It is the most widely used mid-term Quality Control in China method for overseas buyers, cross-border trading companies, and supply chain factories.

For export orders with large volumes, long lead times, complex processes, new molds, or new supplier partnerships, HQC professionally provides third-party During Production Inspection and production process quality inspection services. We focus on solving common problems such as unstable processes during mass production, inconsistent product standards, escalating defect rates, and high rework costs. By intercepting potential quality issues in the middle of production, we mitigate the risk of overall order quality control failure from the source.

Optimal Intervention Point: 30% - 50% Production
The industry-standard optimal intervention point for a Mid-Production Inspection is when order volume reaches 30%-50%. At this stage, semi-finished and finished products are produced simultaneously on the production line, allowing for direct verification of equipment stability, process execution, and employee operational compliance. This is a critical window for correcting production deviations, standardizing product specifications, and ensuring the quality of mass-produced goods.

HQC strictly adheres to AQL sampling inspection standards and MIL-STD-105E international inspection standards throughout the entire process. On-site sampling inspections are conducted rigorously against customer-confirmed samples, order specifications, production drawings, and industry compliance requirements. Our QC Inspection services cater to all categories of export products, including furniture, appliances, hardware, toys, building materials, and daily necessities.  

Comprehensive Inspection Scope
As a professional China Inspection Agency, our production process quality control covers all dimensions of quality inspection items:

·        Product Assessment: Comprehensively testing product appearance defects, dimensional accuracy, workmanship, assembly effect, core functions, and safety and compliance performance.

·        Material Verification: Meticulously verifying raw material materials, component specifications, and batch consistency to prevent incorrect or mixed materials.

·        Process Monitoring: Inspecting production line operations, equipment operating parameters, and process operation specifications to accurately identify hidden problems such as process modifications, workmanship oversights, and parameter deviations. This effectively prevents the continuous mass production of large quantities of defective products.

On-Site Inspection Procedure & Corrective Actions
During on-site quality inspection, our inspectors adhere to the principles of independence and impartiality, strictly sampling, photographing evidence, and recording data.

·        Defect Classification: They differentiate between fatal defects, serious defects, and minor defects according to industry standards, accurately calculating defect rates and conducting root cause analysis.

·        Immediate Rectification: For any quality anomalies discovered on-site, inspectors immediately synchronize with the factory and customer, urging the factory to promptly rectify, debug, and optimize the process.

·        Closed-Loop Retest: They follow up with a closed-loop retest throughout the entire process to thoroughly correct production deviations and solidify standardized production processes.

Fast Delivery: Bilingual Report within 24 Hours
Within 24 hours of inspection completion, a third-party Quality Inspection Report in both Chinese and English is issued rapidly. The data is authentic and traceable, serving as valid evidence for overseas customer acceptance, trade settlement, supply chain audits, and quality rights protection.

The Management Value of DUPRO
By entrusting HQC to conduct DUPRO Mid-Production Inspections, companies can:

·        Monitor order production progress and mass production quality in real time.

·        Promptly correct process deviations and significantly reduce the high costs of product scrapping, rework, and order-wide repairs.

·        Mitigate risks such as substandard finished products, overseas customer rejections, trade deductions, and cross-border after-sales disputes.

·        Maintain stable production quality standards across the entire production line, ensuring on-time and high-quality delivery of international trade orders.

·        Improve supply chain management capabilities and strengthen their reputation with overseas customers.

Partner with HQC Today
Ensure your production stays on track with reliable Third-Party Quality Inspection Services. Contact HQC today to schedule your During Production Inspection and secure your supply chain.

Guangdong China Inspection and Testing Co., LTD (HQC)
Delivering Trust, Safeguarding Quality
Comprehensive Quality Control and Sustainable Supply Chain Operations Solutions