Source

User trying to accomplish a primary task in the application.

Stimulus:

User attempts to use a feature of the software for its intended purpose.

Environment:

The software is operational, running on its standard platform in a typical use-case setting.

Artifact:

The specific feature or function within the software system that the user is interacting with.

Response:

The software provides functionality that allows the user to achieve the desired outcome without any unnecessary steps or interactions.

Response Measure:

Success Rate: 95% of users are able to complete the desired task using the feature on their first attempt.

Efficiency: The average time taken by users to accomplish the task using the feature should not exceed 2 minutes.

Extraneous Steps: Users should not have to undertake more than N necessary steps to achieve the intended outcome, where N is the minimal logical number of steps for that task.

User Feedback: Post-interaction, at least 90% of users should rate their experience with the feature as “Intuitive” or “Very Easy” on a feedback scale.