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This document specifies repeatability standard deviation and reproducibility standard deviation for results obtained from test methods carried out according to the following standards: — EN 12720:2009+A1:2013, Furniture — Assessment of surface resistance to cold liquids, — EN 12721:2009+A1:2013, Furniture — Assessment of surface resistance to wet heat, — EN 12722:2009+A1:2013, Furniture — Assessment of surface resistance to dry heat, — EN 15185:2011, Furniture — Assessment of the surface resistance to abrasion, — EN 15186:2012, Furniture — Assessment of the surface resistance to scratching, in order to provide the accuracy of results. The above standards deal with all rigid furniture surfaces regardless of materials and they do not apply to leather and textile surfaces.