User-Centered Design Process
The user-centered design process (according to ISO 9241-210) describes how systems are developed that meet real needs - through iteration, participation and contextual understanding.
Definition
A user-centered design process ensures that interactive systems are developed for and with the user - systematically, iteratively and contextually.
The four main activities according to ISO 9241-210
1. Understand the context of use
- Who uses the system?
- For what, when and under what conditions?
- What are the needs, goals and restrictions?
2. Derive usage requirements
- Welche Aufgaben müssen unterstützt werden?
- Which functions, data and forms of interaction are required?
3. Develop design solutions
- Sketches, prototypes, wireframes
- Visual design, interaction concepts
- Involvement of real users
4. Evaluate design solutions
- Usability-Tests
- Heuristic evaluation
- A/B tests, field studies, interviews
Iterative instead of linear
The four steps are carried out repeatedly - each evaluation can uncover new requirements.
Principles of user-centered design
According to ISO 9241-210:
- Users take center stage
- Design based on context of use
- Iteration is indispensable
- UX is multidisciplinary
- Usability goals are explicitly formulated
Practical example
A team is developing a medication reminder app for older people:
- Observation of real users in everyday life
- Paper prototypes with clear buttons, large font
- Evaluation through usability tests with target group
- Improvement based on concrete feedback
Conclusion
The user-centered design process is not an additional effort - but a necessity for sustainable UX quality.
It provides the methodological basis for all successful UX projects.
Take Home Message
Systems are only as good as their understanding of the context of use - UX starts with listening.
Last modified: 17 June 2025