Usability (product)

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Serviceability ( English usability ) refers to DIN ISO 9241 -11, the extent to which a product, system or service can be used by certain users in a particular application context to certain objectives effectively, efficiently and satisfactorily achieved. It is thus closely related to the more common colloquial term usability (Engl. User friendliness ) and the broader concept of user experience (UX).

In terms of usage properties, a distinction is made between those that are absolutely necessary and those with additional benefits. The usability can only refer to sufficiently objectifiable facts within the framework of the standardized consideration .

The investigation of usability including user friendliness are essential components in product tests .


The standards bodies have published various standards that are of interest in terms of usability:

  • ISO 9126 ( DIN 66272 ): Quality criteria for software products - Quality characteristics and guidelines for their use
  • ISO 9241 : Ergonomic requirements for interactive systems and the process for designing interactive systems
  • ISO / IEC 12119 : Software products - Quality requirements and test provisions
  • ISO 14915 : Software ergonomics for multimedia user interfaces
  • EN 60601-1-6 : Usability for medical electrical devices
  • EN 62366 : Application of usability to medical devices
  • DIN 66050 : Usability - Concept (1982)

Special features of medical devices

Usability test in the experimental operating room in Tübingen

Since medical devices are generally safety-critical devices, special requirements must also be placed on the usability of these devices. In addition to the usability factors of efficiency, effectiveness and satisfaction, safety must also be taken into account. A usability test should also be carried out in a special usability laboratory to simulate a typical usage environment and situation. Special requirements for the verification and validation of the usability of medical devices are specified in the standards DIN EN 60601-1-6 and DIN EN 62366 .


  • Markus Bautsch: Usability and practical value. In: Tilo Pfeifer, Robert Schmitt (Hrsg.): Masing handbook quality management . 6th, revised edition. Carl Hanser Fachbuchverlag, Munich / Vienna 2014, ISBN 978-3-446-43431-8 , chapter 35.
  • F. Sarodnick, H. Brau: Methods of Usability Evaluation. Hans Huber Verlag, Bern 2011.
  • Arvid Braumann: A human machine-interface for computer-assisted liver surgery - An application example in referring to the IEC 62366 and IEC 60601-1-6 for usable medical devices. VDM Verlag Dr. Müller eK, Saarbrücken 2011.
  • B. Shneiderman, C. Plaisant: Designing the user interface. 5th edition. Addison-Wesley, Boston 2009.
  • Claus Backhaus: Usability engineering in medical technology - basics, methods, examples. Springer, Berlin 2009.
  • Werner Brinkmann , Peter Sieber: Usability, practical value and quality. In: Tilo Pfeifer and Robert Schmitt (eds.): Masing handbook quality management. 5th, completely revised edition. Hanser-Verlag, Munich 2007, ISBN 978-3-446-40752-7 , pp. 777-786. Chapter 35.
  • Michael Herczeg : Software ergonomics: basics of human-computer communication. Oldenbourg, 2005, ISBN 3-486-25052-3 .
  • Jakob Nielsen: Designing Web Usability. Market and Technology, 2004, ISBN 3-8272-6846-X . (German)
  • Norbert Hadwiger, Alexandre Robert: Product is communication - integration of branding and usability. Galileo Press, 2002, ISBN 3-89842-216-X .
  • Steve Krug: Don't make me think! Web Usability - The Intuitive Web. mitp, 2002, ISBN 3-8266-0890-9 .
  • Rolf Alkan Saim: Texts for the Internet, a manual for online editors and web designers. Bonn 2002.
  • Martina Manhartsberger: Web Usability - The Principle of Trust. Galileo, 2001, ISBN 3-89842-187-2 .
  • Andreas Holzinger: Basic knowledge of multimedia. Volume 3: Design. Development basics of multimedia information systems. Vogel, Würzburg 2001, ISBN 3-8023-1858-7 .
  • Martin Schrepp: Measuring user experience with questionnaires. CreateSpace Independent Publishing Platform, 2018, ISBN 1-986843-76-9 .

Web links

Individual evidence

  1. DIN 66050, 2 term , note 1
  2. DIN 66050, 2 term , note 2