BS ISO 29061-4:2017 pdf download

BS ISO 29061-4:2017 pdf download.Road vehicles — Methods and criteria for usability evaluation of child restraint systems and their interface with vehicle anchorage systems
1 Scope
This document 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.
The document 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.
This document 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 29061‑1, Road vehicles — Methods and criteria for usability evaluation of child restraint systems and their interface with vehicle anchorage systems — Part 1: Vehicles and child restraint systems equipped with ISOFIX anchorages and attachments
ISO 29061‑3, Road vehicles — Methods and criteria for usability evaluation of child restraint systems and their interface with vehicle anchorage systems — Part 3: Installation of child restraint systems using vehicle seat belts
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4.2 Scoring system
The scoring system consists of a Good/Average/Poor rating (scored with 3/1/0 points) of each item assessed, and an importance rating A/B/C (scored with 3/2/1 points) for each item. For each assessment, the scoring of the above are multiplied. A maximum score for a “Good” solution on an item with “A” importance is 9 points. In this document, “average” means “mid‑level” and should not be perceived as a statistical average between good and poor. The maximum possible score will depend on the features and usage of the restraint and vehicle. Different products may have different maximum possible scores, and therefore, comparisons of the raw number of total points would not be meaningful. The final rating consists of a total number of points that should be expressed as a percentage of the maximum possible score for the particular conditions. See also further recommendations given in Annex A.