Foreword

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This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 36, Safety and impact testing.

This second edition cancels and replaces the first edition ( ISO 29061-5:2017 ), which has been technically revised.

The main changes are as follows:

reviewed terminology to cover technology and regulation updates since the first edition;
editorial review.

A list of all parts in the ISO 29061 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

Introduction

The usability of a child restraint system (CRS) in terms of ease of:

installation of CRSs in various vehicles; and
day-to-day use with a child (e.g. securing, harnessing, adaption for a growing child)

is of utmost importance to ensure that a CRS is used properly in accordance with the manufacturer's intentions, and to ensure that a correctly installed CRS will provide the best possible protection in a crash situation. An international agreement on usability criteria and measurements is beneficial for both consumers and manufacturers.

The aim of this document is to provide a usability evaluation system for installation of booster system CRSs, when installing them and securing a child, to promote improved design for an easy and correct use.

It provides child restraint and vehicle manufacturers with a tool for the assessment of the usability of new and current systems. At the same time, it provides consumers (parents and caregivers) with usability information on the key features related to the proper use of the attachment system and assist them in selecting child restraints and vehicles that are easy to use properly.

The ISO usability evaluation system has been developed with participation from, and considering the experiences from, usability rating systems of Canada (Transport Canada and ICBC), USA (NHTSA, IIHS) and the European Union (EU) (NPACS and consumer rating programmes, such as ICRT, ADAC).

1 Scope

This document provides criteria for judgement of usability of booster seat child restraint systems (CRSs) when installing them and securing a child.

This document provides criteria for judgement of:

ease of availability of instructions;
clarity of instruction manual and labelling; and
ease of use of design related features of the CRS related to the installation in a vehicle.

The procedure can also be used for evaluation of vehicle integrated booster systems.

NOTE 1 CRS includes enhanced child restraint systems (ECRS) according to UN Regulation No. 129.

NOTE 2 Although ISOFIX is defined in the original “ISOFIX” standard ( ISO 13216-1 ) to be a rigid system, the term “ISOFIX” in this document is extended to include flexible CRS attachments (e.g. LATCH in USA, UAS in Canada).

2 Normative references

3 Terms and definitions

4 Usability evaluation procedure and scoring principles

4.1 Evaluation procedure

4.2 Scoring system

5 Usability evaluation forms

Bibliography