The real estate sector has been flourishing for the past few years with the new projects continuously build to meet the demand of the market. And today, more than ever a lot of people are jump in to any of the real estate sector as a private investor. They investing their money in the hope of gain the future profit on sales. Many others are renting it as a rental property that gives them in going cash on monthly or yearly basis. This sector has never been so booming like now days.

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Elements of a graphical screen upon which some action is to be performed must first be identified. The motor activity required of a person to identify this element for a proposed action is commonly referred to as pick, the signal to perform an action as click. The primary mechanism for performing this pick-and-click is most often the mouse and its buttons. The user moves the mouse pointer to the relevant element (pick) and the action is signaled (click). Pointing allows rapid selection and feedback. The eye, hand, and mind seem to work smoothly and efficiently together. The secondary mechanism for performing these selection actions is the keyboard. Most systems permit pick-and-click to be performed using the keyboard as well.

Restricted Set of Interface Options

The array of alternatives available to the user is what is presented on the screen or what may be retrieved through what is presented on the screen, nothing less, nothing more. This concept fostered the acronym WYSIWYG.

Visualization

Visualization is a cognitive process that allows people to understand information that is difficult to perceive, because it is either too voluminous or too abstract. It involves changing an entity’s representation to reveal gradually the structure and/or function of the underlying system or process. Presenting specialized graphic portrayals facilitates visualization. The best visualization method for an activity depends on what people are trying to learn from the data. The goal is not necessarily to reproduce a realistic graphical image, but to produce one that conveys the most relevant information. Effective visualizations can facilitate mental insights, increase productivity, and foster faster and more accurate use of data.

Taken from : The Essential Guide to User Interface Design

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A graphical system possesses a set of defining concepts. Included are sophisticated visual presentation, pick-and-click interaction, a restricted set of interface options, visualization, object orientation, extensive use of a person’s recognition memory, and concurrent performance of functions.

Sophisticated Visual Presentation

Visual presentation is the visual aspect of the interface. It is what people see on the screen. The sophistication of a graphical system permits displaying lines, including drawings and icons. It also permits the displaying of a variety of character fonts, including different sizes and styles. The display of 16 million or more colors is possible on some screens. Graphics also permit animation and the presentation of photographs and motion video.

The meaningful interface elements visually presented to the user in a graphical system include windows (primary, secondary, or dialog boxes), menus (menu bar, pulldown, pop-up, cascading), icons to represent objects such as programs or files, assorted screen-based controls (text boxes, list boxes, combination boxes, settings, scroll bars, and buttons), and a mouse pointer and cursor. The objective is to reflect visually on the screen the real world of the user as realistically, meaningfully, simply, and clearly as possible.

Taken from : The Essential Guide to User Interface Design

The many benefits of one interaction style versus another are anecdotal. This has often made the debate between advocates of graphical and other styles of interaction more emotional than scientific. This is certainly true for many of the arguments. Over the past couple of decades a variety of studies have been performed comparing graphical systems with other interaction styles. In some usability studies graphical systems were found superior, in other studies other interaction techniques were found superior, and in some cases no differences were found. Perhaps the best conclusion was drawn by Whiteside, Jones, Levy, and Wixon (1985) who compared the usability characteristics of seven systems, including the direct-manipulation, menu, and command language styles of interaction. They found that user performance did not depend on the type of system. There were large differences in learnability and usability among all. How well the system was designed was the best indicator of success, not the style of interaction.

Research and experience have shown that different interface styles also have different strengths and weaknesses. Some concepts and tasks are very hard to convey symbolically and do not seem to be suited for a pure graphical presentation. Other concepts and tasks, however, may be well suited to such an approach. Which tasks are best suited for which styles still needs continuing study. Finally, all users may not like all aspects of a graphical system. The design should reflect this. In summary, the following is clear:

* The design of an interface, and not its interaction style, is the best determinant of ease of use.
* User preferences must be considered in choosing an interaction style.
* In the overwhelming majority of cases, words are more meaningful to users than icons.
* The content of a graphic screen is critical to its usefulness. The wrong presentation or a cluttered presentation may actually lead to greater confusion, not less.
* The success of a graphical system depends on the skills of its designers in following established principles of usability.

Taken from : The Essential Guide to User Interface Design