Identify and resolve quality issues while production is still underway. Our DUPRO service gives you real-time visibility into your manufacturing process.
During Production Inspection (DPI), also referred to as DUPRO (During Production), is an on-site quality control check performed while manufacturing is actively in progress. Typically scheduled when 20% to 60% of the total order quantity has been completed, this inspection provides an early window into the quality of goods being produced. Unlike a Pre-Shipment Inspection which evaluates finished products, DUPRO focuses on catching problems at their source -- before they multiply across the entire production run.
Helmsman Quality Testing Services deploys experienced inspectors to the factory during active production to assess both the finished units available and the ongoing manufacturing processes. This proactive approach allows corrective actions to be implemented immediately, saving significant time and cost compared to discovering defects after production is complete. DUPRO is an essential tool for buyers managing complex orders, working with new suppliers, or producing high-value goods where quality failures are especially costly.
The During Production Inspection is most effective when conducted at the 20% to 60% production completion stage. At this point, a sufficient number of finished units are available for sampling, and the production line is fully operational, allowing our inspectors to observe processes, evaluate raw materials, and assess work-in-progress items. Scheduling the inspection too early may not provide enough finished samples, while scheduling too late reduces the window for corrective action. For long production runs or high-risk orders, multiple DUPRO visits can be arranged at regular intervals to maintain continuous quality oversight.
Our During Production Inspection provides a comprehensive snapshot of quality at the factory. The inspection covers:
The primary advantage of DUPRO is the ability to identify and address quality problems before they are replicated across the entire order. When a defect pattern is detected early -- whether it stems from faulty raw materials, machine calibration issues, or operator error -- the factory can implement corrective measures immediately. This prevents mass production of defective goods, reduces waste, and eliminates the need for costly rework or re-production after the order is complete.
Additionally, the During Production Inspection serves as a powerful communication tool. The inspection report provides documented, photographic evidence of the current production status, which can be shared with all stakeholders. This transparency strengthens the buyer-supplier relationship by establishing clear expectations and accountability. Factories that know their production will be monitored tend to maintain higher quality standards throughout the manufacturing process.
While Pre-Shipment Inspection (PSI) serves as the final quality gate before goods are shipped, DUPRO acts as an early warning system during the manufacturing phase. Together, they form a comprehensive two-stage quality assurance strategy. DUPRO catches systemic issues at the production level, while PSI validates the final output against your full specification checklist. For critical orders, high-value products, or first-time supplier engagements, we strongly recommend combining both inspections to minimize risk and maximize confidence in the shipment quality.
Many of our clients find that implementing regular DUPRO inspections leads to measurable improvements in final PSI pass rates over time, as factories learn to maintain higher standards when they know their processes are being monitored throughout production.
After each During Production Inspection, Helmsman delivers a detailed report within 24 hours. The report provides:
