A software project is the complete procedure of software development from requirement gathering to testing and maintenance, carried out according to the execution methodologies, in a specified period of time to achieve intended software product. Techniques for software maintenance kostas kontogiannis department of electrical and computer engineering, national technical university of athens, athens, greece abstract software maintenance constitutes a major phase of the software life cycle. Software engineering system configuration management whenever a software is build, there is always scope for improvement and those improvements brings changes in picture. The other answers i have read so far all make valid points.
It is become important since several software products lack of documentation and are highly unstructured. Each time a maintenance operation is performed on a program the overall quality of a software system can rapidly decrease because of the introduction of side effects. Any glitches and bugs discovered in the software are corrected so that users can use the software and so that it would operate and run smoothly as well. When a module is invoked, it sometimes has a side effect of modifying the program state. Software engineering reverse engineering geeksforgeeks. Such side effects are due to the relationships existing between the components of a software system, and these can be classified into potential relationships and actual relationships.
It has been neglected in education, partly because of the difficulty of preparing a software system upon which maintenance can be. The process of assessing the effects of such environmental changes on a software system, and then modifying the system to cope with those changes is known as. The ridesharing app, uber, is something of a posterchild for the gig economy, but the gig economy has grown to encompass more and a greater variety of taskseverything from deliveries and home maintenance, to software development and engineering. It detects the adverse effects of modification in the sw system. Concepts and practice software maintenance, it is the representation of those parts of the process specifically pertaining to the evolution of the software. Requirements phase, design, implementation, testing, and maintenance. Software maintenance exercises for a software engineering. Concepts, errors, faults, repair and availability, reliability and availability models. Pdf controlling sideeffects in maintenance researchgate.
First we identify the software maintenance unique activities. Software maintenancesoftware maintenance a very essential activity 2. Software engineering is a detailed study of engineering to the design, development and maintenance of software. Legacy software cannot keep tuning with the latest technology available in the market. This maintenance acts as medicine to prevent the problems.
Software engineering system configuration management. Impact of software comprehension in software maintenance and. Types of software maintenance in software engineering. Apr 06, 2016 software engineering is the study and application of engineering to the design, development, and maintenance of software. Preventive maintenance helps the software to become more scalable, stable, understandable, maintainable. Software maintenance the first law of software engineering no matter where you are in the system life cycle, the system will change, and the desire to change it will persist throughout the life cycle bersoff et al. Although every software code modification has the potential for introducing error, the following set of changes tends to be more errorprone than others. It is a thorough process where the design of software is changed and programs are rewritten.
The issues that are likely to cause big problems in the future are being addressed by preventive maintenance. Maintenance of the software should be easy for any kind of user. Software maintenance in software engineering is the modification of a software product after delivery to correct faults, to improve performance or other attributes a common perception of maintenance is that it merely involves fixing defects. Another of the many types of software maintenance in software engineering is corrective maintenance. Turbovnc is a highperformance, enterprisequality version of vnc based on tightvnc, tigervnc, and. However, i want to add that there is one surprisingly harmful trait that is fairly common among software developers.
The outcome of software engineering is an efficient and reliable software product. It builds a program database and generates information from this. Sometimes, maintenance also involves adding new features and functionalities using latest technology to the existing software system. Software maintenance is a part of the software development life cycle. If i call a function that sends my girlfriend a breakup text message, that affects a bunch of actors, me, her, the cell phone companys network, etc.
Controlling sideeffects in maintenance springerlink. When we need to update the software to keep it to the current market, without impacting its functionality, it is called software reengineering. Free open source windows scientificengineering software. We can alternatively view it as a systematic collection of past experience. Software engineering was introduced to address the issues of lowquality software projects. To improve system efficiency to optimize the code to run faster to modify the components. Apr 18, 2020 perfective maintenance maximizes the maintainability or understanding of the software system. Software maintenance perfective maintenance 2 includes all efforts to polish or refine the quality of the software or the documentation important that the potential benefits of the perfective maintenance outweigh the costs of the maintenance and the opportunity costs of improvements elsewhere or using the resources on new developments therefore before performing perfective maintenance, one should go through an analysis process nevertheless, a little perfective maintenance can have dramatic.
But like many other programmers, barkley has suffered the consequences of his longstanding love affair with the computer. When we need to update the software to keep it to the current market, without impacting its functionality, it is called software re. Software engineering software quality software maintenance impact analysis sideeffects. Reverse engineering is a useful technique when the software maintenance team is unable to understand the processes involved in the software system. Software maintenance in software engineering tutorial 05 may. The management aspects of process create the checks and balances that help avoid project chaosa key contributor to poor quality. It is systematic nse software maintenance engineering paradigm offers systematic approaches for software maintenance. The application of a systematic, disciplined, quantifiable approach to the development, operation and maintenance of software. An idempotent function can have side effects, and a nonidempotent function may have no side effects such as getting the current system date and time. Its primary goal is to modify and update software application after delivery to correct errors and to improve performance. Preventive maintenance the probable future problems of the software are prevented by regularly updating and modifying the software which is known as preventive maintenance. Structure maintenance may be conducted only if the steps of the software engineering methodology, the waterfall cycle. Often we employ programs created using the best design and techniques at their time, when program size and storage space were principal components. Such side effect should be avoided where as possible.
Data sideeffects changes in data structures render older data invalid or incomplete, changes in global constants, changes in data ranges documentation sideeffects forgetting to document code or data structure changes, changes not reflected in user manuals or interface. Reverse engineering reverse engineering is the process followed in order to find difficult, unknown and hidden information about a software system. The purpose of reverse engineering is to facilitate the maintenance work by improving the understandability of a system and to produce the necessary documents for a legacy system. The software maintenance process comprises a set of software engineering activities that occur after the software has been delivered to the user. Geoserver is an open source software server written in java that allows users to share and edit geospatial data. Source code is collected with the help of an automated tool used for reverse engineering. In more general term, a side effect is any effect which is not the intended effect of the designer of the construct. Software maintenance exercises for a software engineering project course abstract software maintenance is an important task in the software industry and thus an important part of the education of a software engineer. As commenter benjol points out, several people may be conflating the. Software engineering software maintenance javatpoint. Characteristics, controlling factors, maintenance tasks, side effects, preventive maintenance re engineering reverse engineering configuration management maintenance tools and techniques. Changes may be required to modify or update any existing solution or to create a new solution for a problem. Thus the maintenance is required to ensure that the system continues to satisfy user requirements. To address this issue and the other maintenance issues presented above, we propose a maturity model for software maintenance modeled after the cmmi of the software engineering institute sei02.
Maintenance management configuration management is an essential part of system maintenance. Software reverse engineering is a process of recovering the design, requirement specifications and functions of a product from an analysis of its code. Coding sideeffects inadvertent removal of vital code, changes in semantics of code, unexpected changes in. Very often in practice we use programs with poorly designed structures, poor coding, poor logic, and poor documentation. Abstractmaintenance plays an important role in the software development life cycle. Such side effects are due to the relationships existing between the.
Data re engineering is only required if the data structures in the program change during system re engineering. However, software re engineering always involves some program restructuring. Software configuration management in software engineering. Most maintenance engineers are newbie and use trial and error method to rectify problem. Documentation updating or code optimizing are involved in preventive maintenance. The injury kept him away from the profession he loved for more. Software engineering tools provide automated or semiautomated support for the. By combining all the above definition we can define software engineering as, software engineering is the technological and managerial discipline concerned with systematic production and maintenance of software products that are developed and modified on time and within cost estimates. Designed for interoperability, it publishes data from any major spatial data source using open standards. Software engineering methods rely on a set of basic principles that govern each area of the technology and include modeling activities and other descriptive techniques.
Does a typical software engineer have health related problems. It is aided with version control tools to control versions, semiversion or patch management. The software is modified so that it can adapt to the changed environment. When the real world changes, the software require alteration wherever possible. Software engineering techniques 3 other software quality efficiency. The process of assessing the effects of such environmental changes on a software system, and then modifying the system to cope with those changes is known as adaptive maintenance perfective maintenance.
These factors should be in build in any good software. Typical formal definitions of software engineering are. Thus, the maintenance is needed to ensure that the system continues to satisfy user requirements. These engineering based factors of the relate to interior quality of the software like efficiency, documentation and structure. Problems arise when a software generally exceeds timelines, budgets, and reduced levels of quality. Software engineering practices allow the developer to analyze the problem and design a solid solutionboth critical to building high quality software. Jul 02, 2018 software engineering software maintenance tutorial. As technology advances, it becomes costly to maintain old software.
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