Program development is a process that consists of many separate operations, but in the end, the user will directly interact only with visual data. Thus, the program interface is a conductor between the client and the proposed functions. Therefore, the design must meet all the necessary requirements, otherwise the capabilities of the program will not be evaluated.
The design of the program interface should take no less time than writing the main code, so you should not forget about this part of the development. It is necessary to take it into account when discussing the timing of the execution of an order. In addition, the creation of a control system should be carried out simultaneously with the development of the functional part of the program.

The program interface appears as a result of a workflow that can be divided into separate tasks. The first stage of development is the analysis of the activities that the user will perform to achieve a specific result. In accordance with this, trial models are created and it becomes clear whether the clientβs actions meet the specified requirements. After the experimental part, some changes are made to the development, the future interface of the program is supplemented by missing elements. Then the final version of the prototype is selected and after creating the test version, the result of the work is agreed with the customer. If necessary, the work includes the creation of training documentation.
Thus, the development of the user interface should be completed by creating a menu. They should provide quick access to the use of the main functions of the program, and also meet a large number of visual requirements. When developing, it is necessary to take into account all the details that may affect the behavior of a person using program windows. The graphical characteristics of the interface include the influence of color combinations, font and font sizes to the assigned task. It also evaluates what impression the overall appearance of the program makes, whether it meets the requirements of a harmonious composition, and whether the user has a desire to return to work with this particular program.

All these requirements can be characterized by one term - usability, which is one of the main criteria for evaluating quality when the program interface is created. The level of usability is determined, as in everything that concerns ergonomics tasks, by indicators of efficiency and productivity.
You can identify the main goals common to the development of any user interface. A high-quality interaction environment should provide time savings in the process of searching for the necessary information, choosing and assigning a specific team. Using a decent interface, human productivity will increase over a given period of time. At the same time, if the client does not get tired or discomfort from long work in one environment, it means that one of the main tasks of the interface developer was professionally completed.