Traceability

Traceability is the ability to track where, when, and by whom a product was made and how it reached the consumer. It is a regulatory requirement in food safety, pharmaceutical management, and automotive recall response. QR codes are widely adopted for assigning unique identification to individual products and enabling scan-based history lookup.

A typical implementation prints a QR code on product packaging that, when scanned, displays origin, manufacturing date, lot number, and quality inspection results. In food, it verifies provenance and organic certification. In pharmaceuticals, GS1 QR codes with serial numbers are becoming legally mandated across countries.

Key design considerations are code durability and information updatability. Long-lived products (auto parts, building materials) need codes readable for years or decades, using laser engraving or etching. For updatable information, the QR code stores only a fixed product ID while detailed data lives in a server-side database.