Design & development inputs
In ISO 9001:2026
Checked — unchanged; a new note says inputs can evolve as the design progresses.
Plain-language summary
Gather everything the design must satisfy before designing: functional and performance requirements, lessons from previous designs, statutory rules, standards, and the consequences of failure — complete, unambiguous, conflicts resolved.
What the clause is really asking
Inputs determined and recorded: functional/performance needs, information from similar previous designs, statutory and regulatory requirements, applicable standards, potential failure consequences. Inputs must be adequate, complete and not contradictory.
What auditors look for
Auditors open a project file at the inputs: customer spec captured? Regulatory requirements identified? Lessons-learned consulted? Conflicts between inputs resolved and recorded?
Typical evidence
Design input checklists; requirement capture documents; lessons-learned references; regulatory requirement identification.
How to comply — recommendations
Run inputs as a checklist signed at gate one — requirements, regulations, standards, lessons learned, failure consequences. Ten minutes of discipline that prevents months of rework.
Common nonconformities
Projects started before inputs agreed; regulatory requirements discovered late; previous failures repeated because lessons were never consulted.
Related clauses
IATF 16949: extended by 8.3.3.1-8.3.3.3
In the book
Chapter 8 — Operation — Where the Product Is Won or Lost treats this clause family in full: what it is really asking, what auditors look for, the evidence that satisfies, how to make it work on a real floor, and where companies stumble.
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