During Production Check (DUPRO)
As an independent, third-party Manufacturing and Industrial Consultancy, Grant Lloyd provides on-site During Production Check (DUPRO) inspection services to ensure your orders stay strictly on schedule and meet exact quality benchmarks
Detect quality issues early with in-process DUPRO Inspections
Maintaining consistent quality throughout a high-volume manufacturing run requires continuous, proactive oversight. By conducting a During Production Check (DUPRO) when 15% to 50% of your order is completed, you ensure that potential manufacturing defects are identified and corrected early in the process.
Furthermore, an in-process inspection prevents small early-stage errors from snowballing into widespread order defects. As a result, implementing a During Production Check (DUPRO) protects your timeline, reduces material waste, and prevents expensive shipment delays. Our experienced consultants conduct thorough evaluations directly on your Vendor’s floor to verify that your production run remains fully aligned with approved specifications.
What Does a During Production Check (DUPRO) Cover?
During a DUPRO inspection, a Grant Lloyd consultant evaluates both finished products off the assembly line and semi-finished items currently in production. Consequently, our comprehensive checklist covers these vital operational areas:
Production Timeline Verification
Assessing actual Vendor output against agreed manufacturing schedules to guarantee on-time delivery.


Workmanship & Visual Checks
Inspecting finished and semi-finished units for physical defects, colour accuracy, and assembly precision.
Functionality & Performance Testing
Testing product operation, safety mechanisms, and basic performance parameters under real-time conditions.


Raw Materials & Components Review
Verifying that incoming raw materials match approved samples and specs.
Packaging & Labelling Checks
Inspecting inner packaging, barcodes, shipping marks, and labelling compliance as packaging begins.

Why Implement a During Production Check (DUPRO)?
Integrating an in-process inspection into your Quality Control strategy delivers several key advantages for your business:
Early Error Correction
Spot defects while production is active, allowing Vendor management to implement immediate corrective action plans (CAP).
Schedule Protection
Prevent late shipment surprises by confirming that production speed aligns with target lead times.
Cost Reduction
Avoid widespread product rework, scrap fees, and costly post-production disputes with suppliers.
Consistent Output Quality
Ensure that high-quality standards are maintained consistently across the entire batch, not just initial test samples.
Recognised Sampling Standards and Rapid Reporting
We execute all DUPRO evaluations using the internationally recognised ANSI/ASQ Z1.4 (ISO 2859-1) statistical sampling standard alongside agreed Acceptable Quality Limit (AQL) parameters. Therefore, you receive an objective, unbiased evaluation of your production run’s overall quality.
Immediately following the on-site evaluation, our consultants issue a daily summary detailing initial findings. Shortly thereafter, you receive a detailed final report featuring comprehensive defect analysis, high-resolution photographs, and actionable recommendations.
More Resources
Discover our full range of Quality Control solutions designed to safeguard your supply chain at every stage of manufacturing. Explore our additional inspection services below to learn how we can help you monitor production, ensure compliance, and secure final dispatch.
What Differentiates Us?
We are convinced that an improved approach to managing your Quality Control strategy exists – one that fosters collaboration between your internal QC and compliance team and our exceptional service delivery team. By working together, we can initiate a new chapter…
Professional
Our team consists of professionally trained consultants and auditors with decades of field experience. We conduct rigorous vendor audits, inline inspections, and pre-shipment checks to verify compliance with global safety and manufacturing standards.
Efficient
From frontline consultants to our technical back office, operational efficiency is core to what we do. We deliver swift turnaround times on detailed inspection reports so your supply chain keeps moving without delays.
Trustworthy
As an independent third-party QC provider, we operate strictly according to our client instructions. Free from outside influences, our ethical code of conduct guarantees transparent, honest reporting on every production run.
Discover More About Our Domains
We provide genuine cross-domain coverage for all of our services, including the set of high-growth domains below and beyond
Case Studies
Read our case studies of our clients and why they chose Grant Lloyd over others
Faithfull Tools – A top hand tools brands in the UK and Ireland trading for over 30 years
Lighthouse Torches – One of the pioneering brands of lighting solutions in the United Kingdom
playmobil® – A renowned manufacturer of toys and playsets from Germany
Heathfield & Co – One of the most notable lampshade suppliers in the United Kingdom
UNI-COM (Global) Ltd – One of the market leaders in electrical products in the United Kingdom
Pineapple Furniture – A pioneering global manufacturer of contract furniture catered
Let’s Talk!
If you need a reputable Quality Control Service, please get in touch with us. We’d be delighted to help you.










