Abstract:

In this era that the popularity of digital products has risen, computer and its tools affect every part of our lives. New technologies provide extraordinary powers to those people who master them. Digital products and their graphical user interfaces are still new technologies that are being rapidly disseminated. Human performance in the use of digital product will remain a rapidly expanding research and development topic in the coming decades. For this reason, the importance of interaction between digital product and user should be considered.

User Interface Design is also known as Human-Computer Interaction(HCI). HCI is the relation of user and computer system. The whole progress becomes by interaction of the system with interface and the interface with user. While people often think of Interface Design in terms of computers, it also refers to many products where the user interacts with controls or displays. The importance of good User Interface Design can be the difference between product acceptance or rejection. If end-users feel it is not easy to learn, not easy to use, or too cumbersome, an otherwise excellent product could fail. Good User Interface Design can make a product easy to understand and use, which results in greater user acceptance.

The term "User Interface" refers to the methods and devices that are used to accommodate interaction between machines and the human beings, users, who use them. User interfaces can take on many forms, but always accomplish two fundamental tasks: communicating information from the product to the user, and communicating information from the user to the product.

The term “Graphical user interface”(GUI) is the layer where the digital product communicated with human and human communicated with digital product. A welldesigned product can fail with an unsuccessful interface. Conversely, a product has not good design values can become successful with its well-designed interface. To get best interaction between digital product and user, the graphical interface design itself needs to have some design values and requires a systematic approach to the design process. But, to ensure optimum performance, it also requires a model of interaction to understand exactly what is going on in the interaction and identify the likely root of difficulties.

To achieve the successful interaction of user and product, there are some principles that should be in consider (Shneiderman, 1987). The main purpose of this research is to providea a guide for well-designed digital product by giving some fundamentals about graphical user interface.

Keywords:

graphic, users, interface, design, human interaction