Mr. Terragni gave a presentation of the progress of work. Step 2/5, i.e. defining the targets and defining the test procedure.

Differences in lab equipment are currently remaining. Evaluation of the methodology: measurement according to the direction of the scratches.

The sample size can differ according to the kind of testing equipment. The samples are measured on both the exterior and the interior sides as a matter of checking that the results will be similar and that the value of the inner side will be below that of the outer side.

Conclusion:
• High variation in all tests except D
• One test lab has low variation in Test A
• Need to increase the number of samples for improving the statistical relevancy
• Perhaps another analysis tool (other than Delta haze) may provide better results because the scratches produced by the wipers are not homogeneous and not deep, hence haze may not be appropriate (vs. homogeneous scratches): straylizer, reduced straight light angle, etc. the deviations are so high that we cannot differentiate the samples, unless there is a statistical result.

A lot of data are available and still some work to do to improve the tests. Mr. Terragni stressed the need also to correlate with subgroup 2.