# For you: A webpage that is 100% accessible to all people around the world, regardless of nationality or disability or Assistive Technology

From: Bryan Garaventa <bryan.garaventa@whatsock.com>
Date: Thu, 14 Aug 2014 12:58:00 -0700
To: <w3c-wai-ig@w3.org>
Message-ID: <000601cfb7fa\$0ee13160\$2ca39420\$@whatsock.com>
```Recently, somebody asked me to show them a website that was 100% accessible,
so I figured it would make a good experiment. Sort of a thought experiment I
guess...

So I built a webpage that is 100% accessible to all people in the world
equally, regardless of nationality, disability type, or Assistive Technology
used.

Enjoy! It's available at

http://whatsock.com/test/100_percent_accessible.htm

Happy testing.

With this 100% accessible baseline to start from, the accessibility
percentage for all web technologies everywhere, scales downward to account
for requisite variables, so that no web technology anywhere can be 100%
accessible as a result.

To demonstrate this, I also wrote the following algorithm, that calculates
the general percentage of accessibility for any given web technology.

X = (1 * Disability-Type * Browser-AT * Site-Interactivity * Site-Complexity
* User-Experience)

P = (Hardware * ((((1 * OS-AT) - X) * Accessibility-Level) + X)) * 100

P is the general Percentage of accessibility calculated for a particular
website or web technology feature, which is based on the following estimated
values for each variable in the formula.

Disability-Type

0.01: Deaf-Blind + Motor-Impaired

0.1: Deaf-Blind

0.2: Deaf + Motor-Impaired

0.3: Blind + Motor-Impaired

0.4: Partially Sighted + Motor-Impaired

0.5: Motor-Impaired

0.6: Blind

0.7: Deaf + Partially Sighted

0.8: Partially Sighted

0.9: Deaf

Browser-AT

1: No AT

0.98: Internet Explorer + JAWS

0.93: Internet Explorer + NVDA

0.95: Firefox + JAWS

0.98: Firefox + NVDA

0.95: Safari + VoiceOver

0.6: Chrome + JAWS

0.7: Chrome + NVDA

0.95: Internet Explorer or Firefox or Chrome + Dragon

0.98: Internet Explorer or Firefox or Chrome + ZoomText

0.9: Internet Explorer or Firefox or Chrome or Safari + Braille Display

Site-Interactivity

1: Contains All Static Elements

0.9: Contains Interactive Features

Site-Complexity

1: Simple

0.95: Medium

0.9: Complex

User-Experience

0.95: Intermediate

0.9: Beginner

Hardware

0: None

1: Computer

OS-AT

0.001: No AT

0.99: Windows + JAWS

0.99: Windows + NVDA

0.99: Windows + Dragon

0.99: Windows + ZoomText

0.99: iOS + VoiceOver

0.99: OS X + VoiceOver

0.9: Windows or iOS or OS X + Braille Display

Accessibility-Level

0.98: Fully Keyboard Accessible + ARIA Standards Compliant (when applicable)
+ WCAG Compliant

0.3: Fully Keyboard Accessible + ARIA Standards Compliant (when applicable)
but not WCAG Compliant

0.3: Fully Keyboard Accessible but not ARIA Standards Compliant (when
applicable) + WCAG Compliant

0.2: Fully Keyboard Accessible but not ARIA Standards Compliant (when
applicable) nor WCAG Compliant

0.1: ARIA Standards Compliant (when applicable) but not Fully Keyboard
Accessible nor WCAG Compliant

0.01: Neither Fully Keyboard Accessible nor ARIA Standards Compliant (when
applicable) nor WCAG Compliant

(More constants can always be added or adjusted)

For example:

(1 * .6 * .95 * .9 * .9 * .9) = 0.41553

(1 * ((((1 * 0.99) - 0.41553) * .98) + 0.41553)) * 100 = 97.85106

So roughly calculated, a Blind person(.6) using Safari+VoiceOver(.95)
accessing a website that Contains Interactive Features(.9) that is
Complex(.9) when the user is a Beginner(.9),

in combination with Hardware(1) that includes iOS+VoiceOver(.99), upon a
website that is

Fully Keyboard Accessible + ARIA Standards Compliant (when applicable) +
WCAG Compliant(.98), will have a general accessibility Percentage of 97.8.

Like I said, these are just estimates, but I thought it would make an
interesting experiment.

Best wishes,

Bryan
```
Received on Thursday, 14 August 2014 19:59:17 UTC

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