Process effectiveness & efficiency (IATF only)
Plain-language summary
Top management must review not only whether processes work (effectiveness) but what they cost in waste and resources (efficiency) — and the results must reach management review.
What the clause is really asking
Effectiveness asks 'did we hit the target?'; efficiency asks 'at what cost?'. IATF wants leadership looking at both — scrap, rework, OEE, cost of poor quality — so improvement targets attack waste, not just defects.
What auditors look for
Auditors look for efficiency measures alive at top-management level: OEE or utilisation data, cost-of-poor-quality tracking, scrap/rework trends — and evidence these were reviewed by top management with actions, feeding management review.
Typical evidence
OEE/utilisation reports; CoPQ or scrap/rework cost tracking; management review inputs showing process performance results and resulting actions.
How to comply — recommendations
Pick a small honest set: OEE on constraint machines, scrap value per month, rework hours. Put them on the management review agenda permanently and minute the decisions they trigger.
Common nonconformities
Only effectiveness KPIs exist; efficiency data collected but never reviewed by top management; no actions traceable to poor efficiency results.
Related clauses
Builds on ISO 9001 5.1.1 / 9.3
Qlause provides interpretive guidance only and is not a substitute for the standard. Refer to your licensed copy of ISO 9001 / IATF 16949 for the authoritative text.