ITU-T Workshop
"The impact of the United Nations Convention on the Rights of
Persons with Disabilities on the work of the ITU-T"
Geneva, 2 November 2009
Ergonomics-oriented design using
ISO/IEC Guide 71 and ISO/TR 22411
Ken Sagawa,
Prime Senior Researcher,
National Institute of Advanced Industrial
Science and Technology (AIST), Japan
Geneva, 2 November 2009
International
Telecommunication
Union
Accessible Design
Extending standard design to people with
special requirements (older persons and
persons with disabilities) to maximize the
number of potential users (from ISO/IEC Guide 71)
Article 9 - Accessibility
in “UN Convention on the Rights of Persons
with Disabilities”
Map
&
Plan
Instruc
３times/day
・・・
・・・
ITU-T Workshop on Accessibility
Geneva, 2 November 2009
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Telecommunication
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ISO/IEC Guide 71: 2001
Guidelines for standard developers to
address the needs of older persons and
persons with disabilities
Factors to consider
Alternative format
Location/Layout
Lighting/glare
Colour/contrast
Size/style of font
Clear language
Symbols/drawings
Volume/frequency
Slow pace
Distinctive form
Ease of handling
Expiration date making
ITU-T Workshop on Accessibility
Geneva, 2 November 2009
Contents labeling
Surface temperature
Accessible routes
Logical process
Surface finish
Non-allergenic/toxic
Acoustics
Fail-safe
Ventilation
Fire-resistance
How to design
How to consider
(Ergonomic issues)
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An example of Factors to consider (1)
Alternative format (Vision  Tactile)
Prepaid cards
Containers
(milk container)
ITU-T Workshop on Accessibility
Geneva, 2 November 2009
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An example of Factors to consider (2)
Sound pressure/frequency (of auditory signals )
Hearing sensitivity and auditory signals
Warning
Termination
Feedback
ITU-T Workshop on Accessibility
Geneva, 2 November 2009
( From Kurakata et al)
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Telecommunication
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ISO/TR22411 (2008)
ISO/TR 22411: 2008
Ergonomic data and guidelines for the
application of ISO/IEC Guide 71 to
products and services to address the
needs of older persons and persons with
disabilities.
A collection of ergonomic data
and design considerations
relevant for accessible design to
implement ISO/IEC Guide 71
(Developed by TC159/WG2)
ITU-T Workshop on Accessibility
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Contents of TR22411 (examples)
Reach range
(physical)
Tactile
discrimination
Working memory and
attention (cognitive)
Step height
(physical strength)
legible font size (vision)
MAP
&
MEMO
Instructi
3 times/day
……………..
Sound pressure and
frequency (hearing)
ITU-T Workshop on Accessibility
Geneva, 2 November 2009
Useful visual field (vision) Colour combination (vision)
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Age-related relative luminance contrast
Luminous efficiency (in log unit)
0.5
(b) Visual contrast estimation
a sign example
sign
Average of
people
-0.5 in their 20s
0.0
Background
-1.0
Le,l (sign)
.0015
.0010
Le,l (back.)
.0005
.0000
Wavelength (nm)
Contrast seen by an observer in their 20s
-2.0
-3.0
spectral radiance data
.0020
400 450 500 550 600 650 700
-1.5
-2.5
Spectral radiance (Wm-2sr-1)
Spectral sensitivity of the eye
as a function of age
Average of people
in their 70s
（a total of 91 subjects）
-3.5
350 400 450 500 550 600 650 700 750
Wavelength (nm）
SLe,l(sign) V(20)(l)Dl - SLe,l(back) V(20)(l)Dl
Contrast =
SLe,l(sign) V(20)(l)Dl + SLe,l(back) V(20)(l)Dl
=
=
34 %
Contrast seen by an observer in their 70s
Contrast =
=
ITU-T Workshop on Accessibility
Geneva, 2 November 2009
0.0155 – 0.076
0.0155 + 0.076
SLe,l(sign) V(70)(l)Dl - SLe,l(back) V(70)(l)Dl
SLe,l(sign) V(70)(l)Dl + SLe,l(back) V(70)(l)Dl
0.0092 – 0.082
0.0092 + 0.082
=
6%
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Telecommunication
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TC159 structure for Accessible Design
Ergonomics for people with special
requirements
WG2
TC159
SC1
SC3
SC4
SC5
Liaison Officer
＋
Advisory Group
ISO TCs and
International Disability Parties
• Ergonomic data and technical guide
Ergonomic guiding principles
• Principles and terminology
Anthropometry and Biomechanics
• Step height
• Reach range
Ergonomics of Human-System Interaction
• Software accessibility
• Tactile markings, etc
Ergonomics of Physical Environment
•
•
•
•
•
Auditory signals
Visual contrast
Color combination
Speech announce guide
Visual signs for low vision, etc
International
Telecommunication
Accessibility
Union
ITU-T Workshop on
Geneva, 2 November 2009
9
Network of Disability Organizations
for Accessible Design
DISABLED PEOPLE’S
INTERNATIONAL
WORLD FEDERATION
OF THE DEAF
INCLUSION
INTERNATIONAL
WORLD BLIND UNION
Int’l FEDERATION OF
HARD OF HEARING
PEOPLE
TC159/AGAD
IDA
Asia Disable
Forum
(APDF)
World Network of
USERS AND
SURVIVORS OF
PSYCHIATRY
REHABILITATION
INTERNATIONAL ORGANIZATION
ITU-T Workshop on Accessibility
Geneva, 2 November 2009
THE WORLD FEDERATION
OF THE DEAFBLIND
Europe
Disable Forum
(EDF)
Arab Disable
Forum
(AODP)
International
Telecommunication
Union
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