RESUMEN

The article focuses on the developments of computer software. Software developments is ultimately an engineering activity, whose primary work is to deliver executable artifacts in a manner that balances the forces on that system. The forces that turn around a software-intensive system include not only its purely functional requirements but also a multitude of nonfunctional ones, such as reliability, portability and scalability. The fact that the forces are dynamic and might change radically over a system's lifetime contributes to making the systems so complex. Relevant forces can be group into five basic categories for these kinds of systems which include, business, environment, development, operations and values.