Make it universal
  Is it designed for a wide range of abilities and needs?

Make it effective
  Does it actually work for the specific needs?
  Has it been tested or at least reviewed by representatives of a wide range of users?
  Is it supported by research, design standards, or other sources?

Make it welcoming
  Does it feel natural and comfortable for all users?
  Does it discriminate unnecessarily on the basis of ability?
  Does it give the impression of disability-based discrimination?

Make it a design solution that is durable over time
  Can it accommodate change through flexibility, adaptability, or adjustability?

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