ISO 29061-1:2010
(Main)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
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 29061-1:2011 provides criteria for the judgement of usability of child restraint systems (CRS) with ISOFIX attachments and their corresponding anchorages in the vehicle. ISO 29061-1:2011 provides criteria for a separate evaluation of the child restraint ISOFIX attachments, of the ISOFIX anchorage installation in the vehicle, and an evaluation of the interface issues when installing a child restraint system in a certain vehicle. ISO 29061-1:2011 covers both rigid and flexible attachment systems of the CRS.
Véhicules routiers — Méthodes et critères pour l'évaluation de la facilité d'utilisation des systèmes de retenue pour enfants, et leurs interfaces avec les systèmes d'ancrage dans le véhicule — Partie 1: Véhicules et systèmes de retenue pour enfants équipés d'ancrages et d'attaches ISOFIX
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 29061-1
First edition
2010-12-15
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
Véhicules routiers — Méthodes et critères pour l'évaluation de la facilité
d'utilisation des systèmes de retenue pour enfants, et leurs interfaces
avec les systèmes d'ancrage dans le véhicule —
Partie 1: Véhicules et systèmes de retenue pour enfants équipés
d'ancrages et d'attaches ISOFIX
Reference number
ISO 29061-1:2010(E)
©
ISO 2010
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ISO 29061-1:2010(E)
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ii © ISO 2010 – All rights reserved
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ISO 29061-1:2010(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 ISOFIX usability evaluation procedure and scoring principles.4
4.1 Evaluation procedure.4
4.2 Scoring system.5
5 Usability evaluation forms.6
Annex A (informative) Recommendations regarding scoring and assessment.19
Annex B (informative) Example usability rating classes .20
Bibliography.21
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ISO 29061-1:2010(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 29061-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 12,
Passive safety crash protection systems.
ISO 29061 consists of the following parts, under the general title 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
⎯ Part 2: Manual to assist the usability assessments of ISO 29061-1 (Technical Report)
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ISO 29061-1:2010(E)
Introduction
The usability of a child restraint system (CRS) in terms of ease of
⎯ installation of child restraint systems in various vehicles, and
⎯ day-to-day use with a child (securing, harnessing, adaption for a growing child, etc.),
is of utmost importance to ensure that a CRS is used properly in accordance with the manufacturer's
intentions, and to ensure that it will provide maximum protection in a crash situation. An international
agreement on usability criteria and measurements is beneficial for both consumers and manufacturers.
The aim of this part of ISO 29061 is to develop and validate a usability rating system for ISOFIX systems to
promote improved ISOFIX design for easy and correct use. It provides child restraint and vehicle
manufacturers with a tool for the assessment of the usability of new and current ISOFIX systems. At the same
time, it provides consumers (parents and caregivers) with information on the key features related to the proper
use of the ISOFIX system, and assists them in selecting CRS and vehicles with ISOFIX systems that are easy
to use properly.
The rating system consists of an assessment form and a manual (see ISO/TR 29061-2). In the manual, the
content of the assessment form is clarified and guidelines and interpretations are provided. The rating form is
also available in Excel (xls) format for download from the ISO standards maintenance site.
The usability of ISOFIX is addressed both in terms of the CRS (attachment system) and in terms of the vehicle
(anchorage system) as well as the interaction of the two, emerging when child restraint systems are mounted
in cars.
The usability evaluation system in ISO 29061 has been developed with participation from, and based on the
experiences from, usability rating systems from Canada (Transport Canada and ICBC), the USA (NHTSA),
and the EU (NPACS and consumer rating programmes, such as ICRT, ADAC).
It is envisaged that this methodology could be useful for current vehicle rating systems such as US NCAP and
Euro NCAP.
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INTERNATIONAL STANDARD ISO 29061-1:2010(E)
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
1 Scope
This part of ISO 29061 provides criteria for the judgement of usability of child restraint systems (CRS) with
ISOFIX attachments and their corresponding anchorages in the vehicle.
This part of ISO 29061 provides criteria for a separate evaluation of the child restraint ISOFIX attachments, of
the ISOFIX anchorage installation in the vehicle, and an evaluation of the interface issues when installing a
child restraint system in a certain vehicle.
This part of ISO 29061 covers both rigid and flexible attachment systems of the CRS.
NOTE Although ISOFIX is defined in the original “ISOFIX” standard (ISO 13216-1) to be a rigid system, the term
“ISOFIX” in this part of ISO 29061 is extended to include flexible CRS attachments (LATCH, UAS).
2 Normative references
The following referenced documents are indispensable for the application 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 13216-1:1999, Road vehicles — Anchorages in vehicles and attachments to anchorages for child
restraint systems -— Part 1: Seat bight anchorages and attachments
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
anchorage
part of the universal interface provided in a vehicle
NOTE See also ISOFIX anchorages and top tether anchorage.
3.2
anti-rotational device
device intended to restrict forward or rearward rotation of a child restraint system (3.6)
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ISO 29061-1:2010(E)
3.2.1
primary anti-rotational device
device intended to restrict forward rotation of a child restraint system
EXAMPLE Top tether or support leg.
3.2.2
secondary anti-rotational device
device intended to restrict rearward rotation of a rearward-facing child restraint system
EXAMPLE Rebound bar or rebound tether.
3.3
attachment
part of the universal interface provided with the child restraint system
NOTE See also ISOFIX attachments (3.9.3) and non-rigid (flexible) attachment (3.11).
3.4
audible
capable of being heard in normal environmental conditions
3.5
base
part of the CRS (3.6) equipped with ISOFIX attachments (3.9.3) which can be attached to the ISOFIX
anchorages (3.9.2) separately from the CRS shell
NOTE The CRS shell is attached on the CRS base in the normal use.
3.6
child restraint system
CRS
free-standing device intended to provide child vehicle occupants with an approved restraint
NOTE CRSs comprise various categories such as car beds, infant restraints, toddler seats (forward and rearward-
facing), booster cushions, and booster seats. Combination products may cover two or more of these product categories.
[ISO 13216-1:1999, definition 3.3]
3.7
connector
connecting and locking device to the universal interface, provided with the child restraint system, and part of
the attachment
3.8
hidden slack
unintended looseness of a strap that is likely to adversely affect the performance of the CRS, and that cannot
be easily detected or can only be detected by handling the CRS attachments in a non-standard way
3.9
ISOFIX
system for the connection of CRS to vehicles, which has two rigid anchorages in a vehicle seating position
located near the seat bight, corresponding rigid attachments on the CRS, and a means to limit the pitch
rotation of the CRS
NOTE 1 In this part of ISO 29061, the term ISOFIX is extended to include flexible CRS attachments (LATCH, UAS).
NOTE 2 Adapted from ISO 13216-1:1999.
3.9.1
ISOFIX accessibility tester
device used to check the accessibility of an ISOFIX anchorage
NOTE The dimensions are defined in Figure 3, ISO 13216-1:1999.
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ISO 29061-1:2010(E)
3.9.2
ISOFIX anchorages
two horizontal rigid bars, 6 mm in diameter and at least 25 mm long, as specified in ISO 13216-1, installed in
vehicles in or near the seat bight, and to which two ISOFIX attachments are connected to secure the lower
part of the CRS
NOTE Anchorages may be rigid or semi-rigid according to Annex A of ISO 13216-1:1999.
3.9.3
ISOFIX attachments
two hardware assemblies, built into the CRS base at 280 mm apart, that meet the requirements of ISO 13216-1
and are used to connect a CRS to ISOFIX anchorages
NOTE Attachments may be rigid or non-rigid according to Annex B of ISO 13216-1:1999.
3.10
misuse
any deviation from the intended application and use of a CRS that might reduce its protective performance
3.11
non-rigid attachment
flexible attachment
one of two (2) prescribed connections, in accordance with ISO 13216-1:1999, Annex B, flexibly supported
from the child restraint system structure, between a CRS and an anchorage
NOTE 1 A non-rigid (flexible) attachment may consist of a CRS connector or hook supported by webbing or the
equivalent. A CRS connector is an attachment with certain specified dimensions designed to be rigidly supported,
described in ISO 13216-1:1999, Figure 8. When designed according to ISO 13216-1:1999, Annex B, a CRS connector
may be flexibly supported.
NOTE 2 Adapted from ISO 13216-1:1999.
3.12
pictogram
illustration or photo used to represent a concept or an operation
NOTE It may be supplemented by text.
3.13
rebound bar
type of anti-rotational device intended to restrict the rearward rotation of a rearward-facing CRS
NOTE It usually comprises a rigid device that, when in its operational position, rests against the car seatback.
3.14
rebound tether
lower tether
type of anti-rotational device intended to restrict the rearward rotation of a rearward-facing CRS
NOTE It usually comprises a tether strap or other hardware attached near the back or base of the CRS that connects
to a rebound tether (lower tether) anchorage. It incorporates a device to enable it to be connected to such an anchorage.
3.15
rebound tether anchorage
lower tether anchorage
anchorage on the vehicle seat track or on or close to the vehicle floor to which a rebound tether (lower tether)
can be attached
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ISO 29061-1:2010(E)
3.16
seat bight
area close to the intersection of the surfaces of the vehicle seat cushion and the seatback or squab
3.17
single action
operation that can be completed without the need to undertake a secondary action
NOTE Examples include tightening a strap by pulling it without the need to release a locking system, or attaching to
an anchorage without the need to depress the seat cushion.
3.18
support leg
type of anti-rotational device comprising a permanent attachment to a child restraint system, or a base of a
child restraint system, creating a compressive load path between the child restraint and a vehicle structure (for
example, the vehicle floor) to prevent or reduce forward rotation of the child restraint
NOTE A support leg may be adjustable.
3.19
top tether
tether strap attached at or near the top of a CRS, incorporating a device to enable it to be connected to a top
tether anchorage
3.19.1
top tether anchorage
device, such as a ring, bar, bracket, or webbing loop, and its underlying structure, either user-ready or
aftermarket-installed, to which a top tether can be attached
3.19.2
top tether strap
webbing strap which extends from the top of a CRS to the top tether anchorage and which is equipped with an
adjustment device, a tension-relieving device and a top tether connector
3.20
usability
extent to which a product can be used by specified users to achieve specified goals with effectiveness,
efficiency and satisfaction in a specified context of use
NOTE 1 This is a generic definition taken from ISO 9241-11.
NOTE 2 Interpretation of the generic definition for the purpose of this part of ISO 29061: the extent to which an
ISOFIX-equipped vehicle or CRS is capable of being used and is convenient and practical in use (separately or combined).
3.21
visible
capable of being seen without tools (other than spectacles) in normal environmental conditions
4 ISOFIX usability evaluation procedure and scoring principles
4.1 Evaluation procedure
This part of ISO 29061 provides a procedure to evaluate the usability of ISOFIX attachments on child
restraints, ISOFIX hardware in vehicle seating positions, and the interface between ISOFIX systems for
specific combinations of child restraints and vehicle seating positions. The rating system takes into
consideration child restraint systems that are equipped with either flexible or rigid ISOFIX attachments
including those that include a top tether or other anti-rotation device(s). The usability rating protocol, aided by
the manual in ISO/TR 29061-2, is intended to be objective and repeatable.
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ISO 29061-1:2010(E)
The rating is most easily accomplished using a team of two people having basic knowledge of child restraints
and being familiar with the technical terms used. The rating procedure for all three aspects of the process —
the child restraint, the vehicle seating position, and the resulting interface — takes about 45 min.
The materials necessary include
⎯ the usability evaluation rating form (in either paper or electronic format),
⎯ the usability rating manual (see ISO/TR 29061-2),
⎯ the vehicle owner's manual,
⎯ the child restraint manual, and
⎯ a screwdriver, or a simple prying/turning tool.
A copy of the terms and definitions from this part of ISO 29061 may also be helpful.
For the independent assessment of CRS ISOFIX connector function, the use of an ISOFIX bar dummy is
recommended. In its simplest form, this can be a straight 6 mm wide bar of at least 280 mm length. It could
consist of two aligned ISOFIX anchorages connected to a rigid supporting material, or a demo seat equipped
with ISOFIX anchorages.
For the independent assessment of vehicle ISOFIX anchorages and the available space around them, the use
of an ISOFIX accessibility tester or a standard ISOFIX connector is recommended, in accordance with the
requirements of ISO 13216-1:1999, Figure 3.
Initially, the child restraint should be as delivered new and separate from the vehicle. The rating process
includes all of the steps necessary, including assembly, to complete the installation. The process should
preferably be carried out by a person unfamiliar with the CRS and vehicle.
Unpacking the CRS, removing the box and plastic protections, detaching the handbook, etc., should be
disregarded for rating purposes, but other initial one-time preparations are considered and assessed in the
forms.
The mode of use for the child restraint (i.e. forward-facing/rearward-facing, upright/reclined, with base/without
base) and the seating position in the vehicle should be determined in advance and documented in the rating
form.
The rating process first addresses the labels and instructions, and finally the ease of installation and removal
of the child restraint system.
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 scores of
the above are multiplied. A maximum score for a “Good” solution on an item with “A” importance is 9 points.
The maximum possible score will depend on the features and usage of the restraint and vehicle. Different
products may have different possible maximum scores and therefore comparisons of the raw number of total
points would not be appropriate. 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.
In addition, the rating will result in a total poor rating (or fail) if the product evaluated does not meet the most
crucial questions of this rating. These are questions 2.2.2 and 2.2.3 for the vehicle (poor rating meaning that it
is not possible to use the ISOFIX anchorages), and questions 3.1.1, 3.1.3 and 3.4.3 for the assessed
combination of a CRS and a vehicle (poor rating meaning that it is not possible to attach the CRS to the
ISOFIX anchorages, or that the CRS/base interface fails).
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ISO 29061-1:2010(E)
The manual (see ISO/TR 29061-2) provides more detailed instructions, illustrations, and examples to aid the
user in the scoring.
5 Usability evaluation forms
The following are the usability evaluation forms:
Form 1: ISOFIX child restraint system.
Form 2: Vehicle ISOFIX and top tether anchorages.
Form 3: Interface — Installing the CRS, or base with seat, in the vehicle.
To enhance the value and applicability of this part of ISO 29061, the forms are also provided in a revisable
(MS Excel) format. These forms are posted on the ISO Standards maintenance website, and can be found at
the following URL: http://standards.iso.org/iso/29061.
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ISO 29061-1:2010(E)
© ISO 2010 – All rights reserved 7
Form 1: ISOFIX child restraint system
NOTE For the independent assessment of CRS ISOFIX connector function, the use of an ISOFIX bar dummy is recommended (see 4.1).
Date of evaluation . Evaluated by. Test no.
ISOFIX child restraint system Rigid attachments Flexible attachments Top tether Support leg Secondary anti-rotational device
Manufacturer .
Child seat make & model . Base make & model (if applicable) .
Country/Area of use . Country/Area of use .
Certification/Type Approval no. . Certification/Type Approval no. .
Production no. (ECE seq. no./US no.) . Production no. (ECE seq. no./US no.) .
Manufacture Date ( yyyy-mm-dd) . Manufacture Date (yyyy-mm-dd) .
If removable base, model no. on base . Mode tested Forward-Facing Rearward-Facing
Type (Infant, Group 1, etc.) . CRS inclination tested Upright/Normal Reclined
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ISO 29061-1:2010(E)
8 © ISO 2010 – All rights reserved
1)
Form 1.1: CRS ISOFIX instructions and labels
Good Average Poor Importance N/A Notes
Pictures plus written
Do CRS or base instructions Visually obvious, able to use Only written instructions
instructions provided. Labels
clearly show how to prepare with pictures only. Labels on provided (may also be non
on CRS non self-explanatory,
and use/attach the ISOFIX CRS self-explanatory, or not self-explanatory pictures) or
or viewable from one direction
attachments? necessary. nothing shown.
1.1.1
only.
Labels on CRS A
Manual C
Pictures plus written
Do CRS or base instructions Visually obvious, able to use Only written instructions
instructions provided. Labels
clearly show how to prepare with pictures only. Labels on provided (may also be non
on CRS non self-explanatory,
and use/attach the CRS self-explanatory, or not self-explanatory pictures) or
or viewable from one direction
anti-rotational devices? necessary. nothing shown.
1.1.2
only.
Labels on CRS A
Manual C
Pictures plus written
Do CRS or base instructions Only written instructions
Visually obvious, able to use instructions provided. Labels
show how to detach or release provided (may also be non
with pictures only. Labels on on CRS non self-explanatory,
ISOFIX attachments, base and self-explanatory pictures) or
CRS self-explanatory. or viewable from one direction
anti-rotational devices? nothing shown.
1.1.3
only.
Labels on CRS C
Manual C
Do the instructions on labels
1.1.4 on CRS or base and in manual Yes No B
convey the same meaning?
1) If ISOFIX attachments are on a removable base, the following questions apply to the CRS base.
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ISO 29061-1:2010(E)
© ISO 2010 – All rights reserved 9
Form 1.2: CRS attachment hardware evaluation
Good Average Poor Importance N/A Notes
Yes No
Can CRS be used without
Some parts must be
CRS delivered as a kit. Parts
1.2.1 initial assembling when taken B
All parts are assembled when assembled, but in a self-
out of the transport package? must be assembled with the
unpacking the CRS. explanatory way and without
use of tools.
the need of tools.
Yes, or if stored, clear single Steps necessary, described No, or if stored, steps not
Are CRS or base ISOFIX
action with pictures or with pictures, or a single action defined with pictures or
attachments ready to use?
markings on CRS. without pictures or markings. markings on CRS.
Rigid attachments B
1.2.2
Flexible attachments B
Top tether B
Support leg or other
B
anti-rotational device
Flexible attachments
Can lower flexible attachments
be correctly routed through
1.2.3 CRS, without risk of misrouting Yes No A
or interference with CRS
harness?
Top tether attachment
Can tether be adjusted with a
1.2.4 Yes No A
one-hand operation?
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ISO 29061-1:2010(E)
10 © ISO 2010 – All rights reserved
Form 2: Vehicle ISOFIX and top tether anchorages
NOTE To aid the evaluation of accessibility to ISOFIX anchorages, the use of an ISOFIX accessibility tester or a standard ISOFIX connector is recommended.
Vehicle category
(2-door or 4-door sedan, 5-door family combi/station wagon, van, SUV, pick-up truck, etc.)
Vehicle – Make, model and model year .
Vehicle – VIN and date of manufacture .
Seating positions with ISOFIX anchorages . (According to seating position codes graph at end of form)
Top tether anchorages
Seating positions with top tether anchorages . (According to seating position codes graph at end of form)
Present and evaluated
Seating position(s) evaluated . (According to seating position codes graph at end of form)
Not available
Interior seating system . (E.g. 3 seat bench, row with 2 seats)
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ISO 29061-1:2010(E)
© ISO 2010 – All rights reserved 11
Form 2.1: Vehicle ISOFIX and top tether instructions and labelling
Good Average Poor Importance N/A Notes
Does the vehicle owner's Can identify all anchorage Can identify all anchorage Manual has written instructions
manual clearly identify positions using ISOFIX positions using some only or shows only some or no
locations and number of pictograms. pictograms and written anchorages, in an unclear
positions fitted with: instructions. way.
2.1.1
ISOFIX anchorages C
Top tether anchorages C
Does the vehicle owner's
2.1.2 manual clearly identify the top Yes No C
2)
tether routing instructions ?
Are all anchorage positions Yes, clear and visible markings Not all anchorage positions Anchorages hidden or not
visible and visibly marked in close to the anchorages. visible or visibly marked, but visibly marked.
vehicle itself (i.e. from point of still easily identified.
installation)?
2.1.3
ISOFIX anchorages A
Top tether anchorages A
Can the top tether anchorages Yes No A
be unambiguously identified,
There is no risk of confusion There is some risk of There is risk of confusion and
with no risk of confusion with
with other hardware. confusion, but top tether countermeasures have not
other similar
...
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