Resource
AQL is not a zero-defect guarantee
An AQL defines the sampling plan and the acceptance limit: it accepts a defined defect rate by design.
Problem Domains
Repeatability
Resource
Why “PVD” does not define a colour
PVD names a coating family, not a colour: the colour comes from the process gas, the layer stack and the target used.
DTC and E-commerce Brands · Private Label
Plating colour that will not repeat
Discounting the older stock, re-shooting the listing, and a customer who now checks the next batch before ordering.
Established brand · Retail chain
The sample was approved, but the bulk order changed
Launch delays, rework, customer complaints and damaged retail relationships. The larger the order, the faster the loss scales.