User-friendliness

User-friendly is a term often used to describe software and other technologies. Its definition is subjective, depending on the user. Useful alternative terms are usability and accessibility, both from the field of human-computer interaction.

Certain parameters can be used to judge the degree of user friendliness include

adequacy

Only necessary input should be required.

learnability

Manuals and instructions should be clear or not necessary.

robustness

Impact of error should be inversely proportional to probability of error.

See also: newbie.