187. Jacket impact assessment was adopted as another improvement to dummy performance, while pelvis impact assessment was not considered to affect the dummy's effectiveness. The optional Skull CAP switch is to be included in the drawing package. 188. At the seventh informal meeting, Humanetics reported on the results of certification tests using the standard probe and the heavy probe. They noted that none offered a clear benefit over the others, while the standard probe is better in terms of reduced burdens in handling in laboratories. On the other hand, the safe handling of such heavy tools is questioned. 189. At the eighth informal meeting, Japan reported that the Standard vs. Heavy probe calibration test results showed that with the heavy probe, the peak value and variation by calibration test had become more apparent. 190. At the fourteenth informal meeting, Humanetics reported on the recommended certification tests as follows:

(a) Spine quasi-static setup; (b) Mini-sled without head restraint; (b) Mini-sled with seat back and head restraint; (c) Jacket only impact; (d) Pelvis only impact (bottom only).

And on the recommended inspection tests as follows:

- (a) Spine bumper stiffness;
- (b) Pelvis shape check.

191. At the informal meeting by WebEX in mid-November 2014, Humanetics reported progress on the dummy certification work and confirmed the ability of the new "Gen-X" test to discriminate dummy responses. They also reported progress on delivering material for Addendum I to the M.R.1. This will include, United Nations numbered drawings, and detailed text to describe the new "Gen-X" certification test. 192. At the eighteenth informal meeting in April 2019, Humanetics reported on the dummy certification work, and particularly, about a halt in the work on the “Gen-X” test. Humanetics recommended, instead of the “Gen-X” test, a regular replacement of all bumpers throughout the dummy to cover bumper change/ageing over time and the additional pelvis and jacket test. The test descriptions will be in the documentation of the addendum to M.R.1 on BioRID UN. 193. At the seventeenth TEG meeting in May 2019 held by Webex, Humanetics explained the simplicity and the advantages of the parts replacement management method over the “Gen-X” test. The properties of the bumpers are checked by a special compression test. Humanetics also informed TEG about some stakeholder’s concerns on the POT-A certification test corridor. They invited test data to be provided for POT- A corridor corrections. The Chair of TEG suggested data collection by mid-June 2019 and progress confirmation at the next TEG meeting. 194. At the eighteenth TEG meeting in August 2019, Humanetics reported on an analysis of certification data from 89 different dummies. The data comprised 1,164 tests from 6 laboratories in an aim to review the certification test corridor, especially POT- A. However, TEG could only make final conclusions during the meeting. The Chair of TEG asked Humanetics for an updated analysis for the nineteenth meeting. 195. At the nineteenth TEG meeting in September 2019, Humanetics presented the results of an updated analysis. Members of the TEG discussed the corridors and proposed only minimal and appropriate changes. Therefore, the Chair of TEG concluded that all certification corridors should be maintained as they are in the current manual with the exception of Pot A and:

- • adjust Pot A corridor at mean and keep the same corridor width. • adjust Pot A corridor at mean and keep the same corridor width.