During the simulation process, user will be asked to perform specific tasks. Instruction steps will be given and user can follow closely to the screen display, reducing confusion and misunderstanding. The package also provides animation or illustrations consisting of a sequence of related screens. During presentation, these screens overlay on each other. The design and implementation are time consuming but rewarding.
Users find the visual effect useful and it helps the user to understand the presented material.
As an example, the sequence in Figure 8 illustrates the charging a capacitor. In this project, the main point was to ensure the control and display flows are smooth and correct. Testing can be carried out once the page design is completed. If there is no animation involved, testing is simply a check on the flow, whether the program branches to the correct page or opens the right book in accordance to the user's selection. Testing of animation is carried out after the whole process has been completed.