Alcance
ISO 29061-4:2017 provides criteria for judgement of usability of child restraint systems (CRS) with regard to the securing of a child in the child seat and other daily handling aspects.ISO 29061-4:2017 provides criteria for judgement of:- ease of availability of instructions;- clarity of instruction manual and labelling; and- the ease of use of design related features of the CRS related to securing the child or child dummy in a CRS installed in vehicle.ISO 29061-4:2017 can be used in conjunction with either ISO 29061-1 or ISO 29061-3 for making a complete usability evaluation of child restraint systems attached to the vehicle with ISOFIX/LATCH or vehicle seat belts.NOTE Booster system usability evaluation, including securing of a child in the booster system, is covered by ISO 29061-5.