Run and control motor in Both Direction by robotics - System Design

Design is multi-step process that focuses on data structure software architecture, procedural details, (algorithms etc.) and interface between modules.
The design process also translates the requirements into the presentation of software that can be accessed for quality before coding begins.
Computer software design changes continuously as new methods; better analysis and broader understanding evolved.
Software Design is at relatively early stage in its revolution.
Therefore, Software Design methodology lacks the depth, flexibility and quantitative nature that are normally associated with more classical engineering disciplines.
However techniques for software designs do exist, criteria for design qualities are available and design notation can be applied.

Input Design

Input design is the process of converting user-originated inputs to a computer-based format.
Input design is one of the most expensive phases of the operation of computerized system and is often the major problem of a system.

Output design generally refers to the results and information that are generated by the system for many end-users; output is the main reason for developing the system and the basis on which they evaluate the usefulness of the application.
In any system, the output design determines the input to be given to the application.