Software reengineering process model

Like Article. Last Updated : 28 Dec, Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. This process encompasses a combination of sub-processes like reverse engineering, forward engineering, reconstructing etc.

Re-engineering is the reorganizing and modifying existing software systems to make them more maintainable. Objectives of Re-engineering: To describe a cost-effective option for system evolution. To describe the activities involved in the software maintenance process.

To distinguish between software and data re-engineering and to explain the problems of data re-engineering. Steps involved in Re-engineering:. Skip to content. Similarly, you may ask, what do you mean by the term software reengineering why is it required? Software Reengineering is the process of updating software without affecting its functionality. This process may be done by developing additional features on the software and adding functionalities that may or may not be required but considered to make the software experience better and more efficient.

Software reengineering process allows modernizing the used system and eliminating technical problems, which reduces the cost of service and expands its capabilities in terms of meeting business needs. The modern world is too volatile to allow yourself the luxury of staying in one place and not changing anything. Software engineering can be broken down into two main types : systems software and applications. This covers the four pillars of web engineering : E-commerce web development, Core web, Mobile web, and New web technologies.

There are two main types of software: systems software and application software. Systems software includes the programs that are dedicated to managing the computer itself, such as the operating system, file management utilities, and disk operating system or DOS. The three types of computer software's are systems software , programming software and applications software.

Read on to know the differences. The goals of software engineering are straightforward and easy to understand — but they aren't always easy to meet. Software provides the means for accomplishing many different tasks with the same basic hardware. Practical computer systems divide software systems into two major classes: System software : Helps run the computer hardware and computer system itself. Some application software is pre-installed on most computer systems.

Software models are ways of expressing a software design. Usually some sort of abstract language or pictures are used to express the software design.

For object-oriented software , an object modeling language such as UML is used to develop and express the software design. Principles of Software Engineering Separation of Concerns. Weak documentation is the trademark of many legacy systems.

But what do we do about it? What are our options? Creating documentation is far too time consuming. In some cases, this is the correct approach. It is not possi- ble to re-create documentation for hundreds of computer programs. If a pro- gram is relatively static, is coming to the end of its useful life, and is unlikely. Create only as much to undergo significant change, let it be! Documentation must be updated, but we have limited resources.

It may not be necessary to fully redocu- understanding of the. Rather, those portions of the system that are currently page more. Over time, a collection of useful and relevant documentation will evolve.

The system is business critical and must be fully redocumented. Even in this case, an intelligent approach is to pare documentation to an essential mini- mum. Each of these options is viable. A software organization must choose the one that is most appropriate for each case. Reverse engineering. The term reverse engineering has its origins in the hardware world. A company disassembles a competitive hardware product in an effort to under- stand its competitor's design and manufacturing "secrets.

But these documents are proprietary and unavailable to the company doing Reverse engineering. But these documents are proprietary and unavailable to the company doing. Reverse engineering for software is quite similar.