Provide enough time to allow the person to read, digest and respond to the information
You can account for this by identifying timed actions. For example, when completing a form, the person is informed, “you have 15 minutes to complete this form”. It is recommended that the option of additional time should be provided for timed actions.
Ideally avoid time-outs and time limitations
Where there are time limitations and time-outs ensure that it is possible to request more time. Consider if a person is likely to have to locate or prepare information to enter on a form.
If a time-out occurs, try to ensure that users can restart the process without losing the data they have entered.