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GRSP Ad hoc Group on R44 COP

Informal document No. GRSP-34-28 (agenda item B.1.5.). GRSP Ad hoc Group on R44 COP. 34th GRSP - 8 to 12 December 2003. Germany UK Sweden Spain Clepa France. Meeting the 16 & 17 October in Paris Working documents: GRSP/2001/13 GRSP/2003/13. The Ad hoc group. Agreed principles.

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GRSP Ad hoc Group on R44 COP

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  1. Informal document No. GRSP-34-28 (agenda item B.1.5.) GRSP Ad hoc Group on R44 COP 34th GRSP - 8 to 12 December 2003

  2. Germany UK Sweden Spain Clepa France Meeting the 16 & 17 October in Paris Working documents: GRSP/2001/13 GRSP/2003/13 The Ad hoc group

  3. Agreed principles • 3 phases • Type approval • Qualification of production • Control Of Production • Statistical Control based on: • Mean value • Standard deviation

  4. Sampling • Clepa shows that 10 samples don’t bring a lot more confidence than 5

  5. X L 2.4S FAIL CRS population • Clepa shows that the repartition of the CRS population is skewed and not normal

  6. Qualification of the production • With for maximum horizontal head excursion • M + 1 x SD ≤ Limit • no value ≥ 1.05 x Limit on 5 samples we are confident in the improvement of quality of the production • Application of the first criteria to the 3 ms clipped resultant chest acceleration for information only

  7. Conformity Of Production • By batch control • Normal: 2 (+2) by batch between 500 and 5000 units => 0.04% (0.08%) (x 4) • Strengthened: 4 (+4) by batch between 500 and 5000 units => 0.08% (0.16%) (x 5) • By continuous control • Normal: 0.02% of the production (x 40) • Strengthened: 0.05% of the production (x 30)

  8. Conclusions • Some add on: • Control and recording of marking • Application to Universal, Semi Universal and Restricted CRS • Needs that approval Authorities must verify the conformity of production procedures of manufacturers during periodic visits

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