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    ManufacturingManufacturing & SupplyECO / ECN

    Engineering Change Order / Notice

    Documents that authorize and communicate changes to released designs, BOMs, or manufacturing processes.

    Reviewed by Christian Espinosa, Founder, Blue Goat CyberLast reviewed May 5, 2026

    Definition

    ECO/ECN processes are the practical mechanism behind the 21 CFR 820.30(i) and ISO 13485 §7.3.9 design change requirements. They link the change request to impact analysis, approvals, training, and effectivity.

    What this means in practice

    PLM systems automate ECO routing; weak effectivity tracking leads to mixed-revision inventory and field issues.

    Primary references

    3 sources
    Link health: 3 verified· last checked 2026-05-09
    eCFR·1FDA·1ISO·1
    1. 1
      21 CFR 820.30(i)
      Verified
      eCFRecfr.gov
    2. 2
      FDA - Device Manufacturing
      Verified
      FDAfda.gov
    3. 3
      ISO 13485 Standard Page
      Verified
      ISOiso.org

    Inline markers like [1] jump to the matching reference above.