I will ask but still very common, where usability comes from, ".
Many definitions of the words to explain, that systems user-friendly (user friendly) are. Also, the high usability provides the opportunity, a system easy to use (ease of use), because it ergonomic was designed. Furthermore, we learn, that the Gebrauchstauglichkeit determines a good Human-Computer Interaction (Human-Computer Interaction-/ HCI) six.
Looking back to the 15. Century, one thing can, that Leonardo da Vinci already knowledge of the people for the development of new technologies in the center of attention.
In the 40 ies, driven primarily by the U.S. military, creates a field for research into human factors in the application of technologies. Human Factors.
The journal "Ergonomics" widespread 1957 Ergonomics as a science to study the relationship between man and his work.
The birth of Usability are in the 70 ies.
At that time, psychologists were interested in the design of dialogue systems. They wanted to make them faster and more efficiently, and examined in this context, how people process information and solve problems. The study of communication between humans and computers (Human Computer Interaction/ HCI) http://de.wikipedia.org/wiki/Mensch-Computer-Interaktion is a recognized scientific discipline.
But there were quite a few psychologists have a simpler operation in addition to striving for efficiency and speed.
These began in the mid 80 He's with the systematic study of human- Computer Interaction in the discipline Software Ergonomics http://de.wikipedia.org/wiki/Software-Ergonomie. Dh. they dealt with the "usability" in the use of interactive systems. Often mentioned in this context the terms ease or. Usability of a system.
The Internet is, through the use of websites by the users, the term User friendliness (user friendliness) close. Reaches a user-friendly, if the use is appropriate to use in a given context. Ease thus designates the user-experienced quality of use when interacting with a system. A particularly simple, matching tasks to the user and his operation is regarded as more user-friendly.
The Internet can be as midwives for the breakthrough of Usability be called. The user no longer is seen as an insignificant factor at the end of a software development process, which one is used by properly trained, have a new application.
The user moves to the center of attention.
Since 1997 there is the DIN EN ISO 9241-11 an international standard, Usability is defined as the extent, by a technical system can be used by specific users in a specific context, certain goals effectively, to achieve efficient and satisfactory.
Effective = solution for a task (zB. Infosuche, Product Search)
= Efficient in the use of the system (Website)
Satisfaction = in the use (Website)
The part 10 This standard contains specific design principles for the dialogue design.
Ten years ago, the Web still exciting for the people, today it is for much of a tool and routine.
The usability guru Jakob Nielsen described usability as a quality- Attribute in relation to, Something as easy to use. He also put in a nutshell:
If a site is appropriate, we will use it, if not, then no (Nielsen, 2006, Prioritizing Web Usability).
User-friendly sites charge their users rather to a, to dwell on them or to buy something. This user-friendliness can therefore provide sales.
Badly done websites in contrast, not only cause a bad feeling, but rather keep a large number of users most likely depend, to buy something, or at worst, ever come back.
What is badly done websites? I shall address in a subsequent review.