confidence in repeatability and reproducibility of real tests might be due to high tolerance of some factor of the dummy and considered that the current tolerance for the BioRID II setting should be reconsidered for establishing a test procedure in UN GTR 7, Phase2. 201. At the ninth IWG meeting, the Transport Research Laboratory (TRL) reported the outcome of an EC study that evaluated the dummy reproducibility and repeatability using sled test. The results indicated some specific channels do not provide adequate reproducibility (CV). The dummy response was sensitive to the change which suggested that certification test and better control of material properties might be needed. The spine bumper, jacket and pelvis fresh will be examined and the dummies refurbished. The refurbished dummies will be evaluated with the same sled test condition in a timely manner. 202. At the eleventh informal meeting, Humanetics reported on the sled test results of the refurbished dummies. The results indicated better reproducibility with CV values but still needed data analysis. The TEG Chair proposed an additional sled test series with European Commission (EC) project rig seat and PDB hard bucket seat. The test results were discussed at the subsequent IWG meeting in mid-February 2013. 203. At the BioRID TEG and IWG meeting, Chrysler reported the repeatability and reproducibility analysis from the EC project of dummy repeatability and reproducibility, which showed that some channels are good and some poor. The dummy components, jacket, pelvis and bumper had since been updated through validation tests and the analysis showed the dummy reproducibility had been improved (Series1, Series2). 204. At the fifteenth IWG meeting, Humanetics reported on the status of development update* for the dummy certification test and the reproducibility issue. Humanetics reported that the stiffness of the candidate replacement materials for the spine bumper (Urethane rubber) in BioRID had proven unstable with ageing. He confirmed that all current testing proceeded by using matched and stable material and that new materials, when available, would be benchmarked against the original. 205. At the IWG meeting by WebEX in mid-November 2014, Humanetics reported that the dummy quality had improved as a result of the new procedures. Repeatability, reproducibility and C.V values were reported for several dummies. Matched dummies were identified for delivery to NHTSA (VRTC). 206. At the sixteenth informal meeting, NHTSA provided positive data for the repeatability and reproducibility of BioRID based on their latest sled test series. 207. At the seventeenth TEG meeting by Webex, Humanetics spoke about the investigation of R&R by the bumper compression force test. Japan agreed to provide the bumper for this investigation data. Humanetics would report on the conclusion of the R&R by the bumper compression force test at the next TEG meeting. 208. At the eighteenth TEG meeting, Japan showed research on the influence of the hardness of ARA-220 bumpers to Pot A corridor. At the nineteenth TEG meeting, Humanetics spoke about the addition of the bumper compression values to the bumper drawings.

(vi) Dummy seating conditions

209. At the "meeting of interested experts" and at the first informal meeting on the seating procedures of IIWPG and EuroNCAP, Japan made proposals on:

(a) Design reference torso angle; (b) Reduction of backset tolerance; and (c) Special adjustment in the case of smaller torso angle (more upright) seats typically used in small N vehicles (especially those with forward control). 1