Usability

Site Usability (called usability
- usability, ease of use, ergonomics) - property maintenance, that
dictates the ease with which a user can navigate between the parties and
to work in his intefejsie.

For usability of a number of factors, such as:

• Nauczalność (learnbility).
  He talks about how fast the user who first sees the interface service
  will possess the skills necessary to perform simple tasks and functions.


• 
  Efficiency of use (efficiency) - determined on the basis of convenience
  and the speed with which the visitor will move in and do the job.


• Zapamiętywalność (memorability). Specifies the ability to quickly memorize the principles of the interface and its navigation. If the next entry you must re-learn the rules of navigating the site, it may mean that it is difficult to remember.


• 
  The number and severity level of error is a factor determining how
  often people make mistakes when moving around the site, how they are
  important and what are the possibilities of repair.


• The subjective feeling, the personal service evaluation by the user.

The importance of usability


Research professionals, such as your User Interface Engineering Inc.,
shows that the search users in 60% of cases they can not find you're
looking for. This leads to lower productivity, loss of valuable time and a decrease in the number of visits the site.
However, according to data provided by Forrester Research, "thanks to
poor usability stores are losing 50% of the buyers, 40% of which will
never come back." Studies on the behavior of users on the Internet show
that visitors receive bad services not loading in a complex structure. Internet users do not want to wait for the complete page load, and spend time to understand the rules of navigating the site. In today's Internet, there are no such concepts as manual repair or exchange service page.
You want to understand the functionality of the service in the first
sekunadach explore page, or instantly know how to navigate through the
site, and immediately save the structure and functions of the service it
offers. If this does not happen, the internet just moves to a different, more rewarding him direction.
A manifestation of concern for the usability is to design a site that
is dedicated to the user, which in turn affects such important
indicators as the frequency of visits and conversions.



Design and Usability Testing

The process of creating a functional and usable website can be divided into two stages: development and testing.

• 
  Designing Usability (Usability Engineering) is part of a methodological
  approach to creating a functional and user-friendly web interface
  interentową. The result of the work at this stage should be properly functioning, efficient and easy-to-use service. Designing usability consists of several stages, of which the most important are:
  
  
  • collect data and requirements for the proposed service;
  
  
  • development and testing of a prototype;
  
  
  • evaluation of design alternatives, and navigation service;
  
  
  • analysis of the problems that you may encounter;
  
  
  • provide solutions and testing them.
  
  
  
  


• Usability Testing (Usability Testing). This is the final phase of the development site usability. The standard test is performed by the user - Scan a certain amount of tasks using the prototypes. During these tests recorded everything he does and says tester. A typical test is performed by at least two users working together. As a result, testing should be collected:
  
  
  • information about the order of steps performed (action) necessary to achieve this objective;
  
  
  • Information about the mistakes made by the user;
  
  
  • because of the difficulties that you encountered;
  
  
  • data rate performance for the tasks;
  
  
  • subjective evaluation of the user's activities on the site.
  
  
  
  

The purpose of testing is to detect potential problems which may be encountered users and to find methods for their solution.

The steps for creating a functional and convenient to use website

• The preliminary stage - at the initial stage, you specify:
  
  
  • goal that guided the creation of service;
  
  
  • target group of Internet users;
  
  
  • characteristics, determining the members of the target group and the objectives for which they visit service.
    These goals are generally the same for most sites, but depending on the
    subject, which moves a particular service specialists who design
    usability can get a additional targets.
    In the process of goal setting should be remembered that the service
    should be as simple, easily digestible and efficient to use, easy
    zapamiętywalnym and satisfactory from the point of view of the
    subjective assessment of the visitor.
  
  
  
  


• A collection of data and requirements
  (for existing sites) - This step is the collection of information from
  users about their requirements for service and assessment of how the
  current website project that corresponds to the requirements. Data can be collected from users by:
  
  
  • form and return form;
  
  
  • analysis of server logs;
  
  
  • Usability testing of an existing service.
  
  
  
  


• Development of a prototype. Well known that the study of impacts is much easier for a real object, and therefore are created prototypes of websites. With their creation uses a minimum amount of content and does not load graphics.
  At this stage, the most important is to analyze the opinions and
  comments of testing users and to determine how the prototype of the
  website is able to perform set tasks.


• Create content and its optimization. One of the main criteria of good usability is the attractiveness of the content to the user. Out of all the information gathered on the site is placed ones are really needed, interesting and understandable for the user.
  Most Internet users during the first few seconds of viewing, scanning
  visual information arranged on the site and read only the ones that
  caught their attention. The text on the page is split into headings, titles and subtitles. In order to facilitate reading and sorting information applies paragraphs, lists, tables.


• Organization-page navigation.
  Main criteria determining the quality-designed navigation is based on
  simplicity and ease with which users can navigate through the pages of
  your website. Therefore, the navigation should be the same on all sites, intuitive, understandable and easy to remember.
  Testing usability testing is an interactive process of detecting the
  factors that help the user, and those that hinder him, carried out in
  order to exclude the latter.
  Testing is typically performed several times, until the development of
  the final variant, corresponding to the requirements of usability.