The software is an immaterial production of human knowledge and perhaps one of the most complicated structures that the world knows. In fact, computer specialists do not yet fully understand its operation, its behavior, and its limits.

Basically, computer software development is an operating plan for a special type of virtual machine. Once written by means of some programming language, the software creates its operation in computers which temporarily become a machine for which the program serves as a plan.

The software development projects make the interaction between the human being and the machine and the computers among themselves. Without the set of instructions that are programmed, computers would be useless objects, without the ability to even show something on the screen.

The communication between computers is done through binary codes, something that for the human being is not a comprehensible form. While in those heroic times with the departure of these computers people had no choice but to adapt but programmers no longer write their codes in binary languages, it is a bit uncomfortable, uncreative and very subject to errors.

The software development models are born from a need to automate a process. It is contributed or it is acquired, it is installed, it is administered and it is removed.

It is often difficult to clearly see what is expected. At other times it is difficult to ensure that it can be built. As of today, no applications have been built that produce general documents between languages very effectively or are capable of interpreting the human voice at a sufficiently good level to replace other mechanisms of interaction.

The software is also called as a system design and development. The designing software requires not only determining requirements but in an important way to create “business process software” that will allow its excellence.

The design of the software will change depending on the way you think about marketing the software. If two related functions are developed in a single module and eventually it is decided to market separately, an additional effort that has been considered from the beginning is generated.

Software application development encompasses a variety of additional decisions that must be made:

• The clear definition of the user and the price that he will pay for the software or the strategic plan of alignment of Information Technology to the business.
• The licensing and distribution of intellectual property.
• The actors or the complete Ecosystem that intervene for each stage of a software project.

At the level of each piece of software, the computer systems analyst is responsible for answering all these questions and creating clear expectations about market participation and strategies to win their work also includes the commercial launch of the product.