Last updated: May 29, 2026

Quality control should not start when finished products come off the line.

By that point, the design may already be frozen, suppliers selected, components approved, tooling made, work instructions written, and the production process set up. A final inspection can still catch defects before shipment, but it cannot undo all the decisions that created those defects in the first place.

That is why quality control during NPI is so important.

In episode 330 of China Manufacturing Decoded, Adrian and Renaud discuss what QC should look like before mass production begins. They explain why product requirements need to be clear, why supplier and component qualification matter, how inspection and testing processes should be prepared, and how mistake-proofing, jigs, fixtures, and pilot runs can reduce the risk of costly production problems.

The key point is simple: final inspection is reactive. Good NPI quality control is preventive. It helps you build quality into the product and manufacturing process while there is still time to make changes.

 

Listen here

Listen to the episode or watch on YouTube

 

Podcast sections

  • 00:01:14 Why many companies treat quality control as an end-of-line activity
  • 00:02:08 Why final inspection is reactive, not preventive
  • 00:04:01 How to build quality into the product and process earlier
  • 00:04:44 Why everything in product development can affect quality
  • 00:06:08 Product requirements as the foundation of NPI quality control
  • 00:07:09 Supplier qualification, design risks, inspection, and testing
  • 00:08:29 Quality gates, validation, reliability, compliance, and performance
  • 00:09:36 Manufacturing process controls and why they need to be planned
  • 00:12:02 Using AI to help document product requirements
  • 00:13:00 Examples of turning user needs into measurable specifications
  • 00:15:41 Cosmetic standards, boundary samples, and critical measurements
  • 00:18:21 Qualifying suppliers, components, and materials
  • 00:19:53 Turning requirements into inspection and testing processes
  • 00:22:18 Applying QC controls during prototype and pilot batches
  • 00:23:04 Work instructions, jigs, fixtures, and process risk reviews
  • 00:25:05 Mistake proofing example: preventing drilling errors
  • 00:26:28 Eliminating risks where possible, controlling them where not
  • 00:27:12 Why prevention is stronger than end-of-line inspection
  • 00:28:04 Final takeaway: quality-forward NPI reduces production risk

 

Further content

 

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Adrian Leighton

About Adrian Leighton

Adrian is the Sofeast group's experienced marketer and has worked in manufacturing for around a decade. He has a particular interest in new product development and sharing important manufacturing news from China. If you've read, watched, or listened to some Sofeast content, Adrian has probably had a hand in it!
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