Human Processor Model

Use this skill to make a fast, explicit usability estimate from a concrete task. The goal is not false precision; it is to expose where perception, cognition, memory, or motor action makes the flow slow or fragile.

Inputs

Collect or infer:

• Target user and relevant constraints: novice/expert, older adult, motor impairment, low vision, stress, interruption risk.
• The exact task goal and success state.
• The current method: screens, controls, labels, data entry, navigation path, and feedback.
• Competing method, if the user wants a comparison.

If the UI is not provided, ask for the smallest missing artifact that determines the steps: screenshot, route, prototype, task list, or current implementation path.

Workflow