Determining the Precision of the Hybrid III Small Female Neck Calibration Laboratory Test Procedure Using ASTM E 691

Lab-to-lab differences have become a very important consideration in the verification testing of Hybrid III 5^th Female necks in user labs. It has been observed that a neck certified by one laboratory does not always pass the same certification test in a different lab. This has led the Anthropomorphic test device Certification Research group (ACR) to investigate the precision of the test procedure in relation to the test specification corridors.

This study adapts an industry recognized ASTM procedure to measure the precision of the SAE neck calibration laboratory test procedure in Engineering Aid 25 [1]. The ASTM procedure is ASTM E 691-99 “Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method” [2].

This paper details how the ASTM procedure was adapted and presents the results of the ASTM E 691 statistical analysis procedures.