Georgia Tech Research Institute

Displays: Issue 6 of 6

Issue: System time-outs may cause problems for some users.

The user interface for kiosks may include system time-outs, which are situations where the user interface automatically changes states or resets if user input is not received within a certain time period. People with disabilities often require more time to respond than non-disabled users, so system time-outs can disrupt their transactions if they are not notified that a time-out has occurred and allowed to request more time.

Populations Impacted: Users with cognitive impairments; users with upper mobility impairments; users who are blind; users with low vision.

Potential Solution:
  • Alert users when a time-out occurs, and allow them to request more time. When a system time-out occurs user is performing a task, the user should be alerted that the time-out has occurred, and given the option to request more time or cancel the task. The user should be given sufficient time to respond to the alert before it expires. A good rule of thumb for what constitutes sufficient time is 10 times the amount of time it would take an average user to respond.

Applicable Guidelines:
Section 508 - 1194.25(b)
Section 255 - 1193.41(g), 1193.41(i)(2)(f)