Interaction Design

Technical explanation

Interaction design specifies behaviours, states, controls, feedback, timing, error handling and transitions across a user flow. Practitioners use task analysis, prototypes and usability evaluation to test whether the interaction is understandable, efficient and accessible.

Business relevance

Well-designed interactions reduce errors and support costs, improve task completion and trust, and turn functional requirements into usable customer experiences.

Implementation example

A payment flow validates fields without losing entered data, explains errors next to the relevant control, confirms the transaction clearly and supports keyboard and assistive-technology use.

Limitations and common misconceptions

A polished interface cannot compensate for the wrong task, inaccessible foundations or poor service design. Patterns that work in one context may fail for different users, devices or risk levels.

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