This is basically an adhocapproach to maintaining software. Software maintenance maintenance definition, categories of maintenance, problems during maintenance, maintenance models quick fix model, iterative enhancement model, reuse oriented model, boehms model, taute model. Software maintenance maintenance models iterative enhancement maintenance model quick fix model reuse oriented model. Software testing and maintenance 19 iterative enhancement model analyze existing system characterise proposed modifications redesign. Maintenance is applicable to software that is developed using any software life cycle model for example, spiral or linear. Software maintenance as part of the software life cycle comp180. Several maintenance models, such as boehm, quick fix, osborne, full reuse, iterative enhancement and the isoiec 14764 and ieee1219 ieee standards for maintenance have been proposed. Software maintenance as part of the software life cycle. Some programs took that to mean that time had moved backwards. This set of software engineering mcqs focuses on software maintenance 2. With the quickfix model, maintainers start by modifying the source code, then test the new version, and finally modify the existing documentation.
Computer science abstract software maintenance refers to the process of changing a system after it has been delivered and is in use. Various software maintenance models are listed below. The incremental model also known as iterative enhancement model comprises the features of waterfall model in an iterative manner. Assessing the maintenance process through replicated. There are some models for the maintenance of the software system, qquick fix model is one of them. Software engineering quickfix model software maintenance is a process of modifying a software system after delivery to correct the faults, add new features and to remove obsolete functions. Due to time constraint, first identify the problem, modify the code to fix the defects as quickly as possible then modify the documentation. Changes are made at code level as early as possible without anticipating future problems. Software maintenance refers to the process of changing a system after it has been delivered and is in. This occurs because the software maintenance team is unaware of the requirements and design documentation. Consider the three maintenance process models, proposed by basili in 3. To beat these issues, software maintenance models have been proposed. Software products change due to corrective and noncorrective software actions.
Kagan erdil emily finn kevin keating jay meattle sunyoung park deborah yoon december 16, 2003. With the quick fix model, maintainers start by modifying the source code, then test the new version, and finally modify the existing documentation. Modification requests are logged and tracked, the impact of proposed changes is determined, code and other software artifacts are modified, testing is conducted, and a new version of the software product is released. The objective of this model is to identify the problem and then fix it as quickly as possible. Also, the maintainability degrades faster when the quickfix model is used. The model explicitly supports reusability of codes and also accommodates other models, for example the quick fix model. Pdf iterative reengineering to compensate for quickfix. Various process models 5, 6, 10, 19, 49 supporting the evolution of software have been introduced. Software testing and maintenance 16 quickfix model problem found fix it.
Iterative reengineering to compensate for quickfix. Software maintenance performed to make a computer program usable in a changed environment business rules, government policy, software. Iterative enhancement model d quick fix model view answer. This is the simplest model used for the maintenance of thesoftware. In fact, we can identify at least three process models associated with maintenance depending upon the characteristics of the modification. Software maintenance process starts without proper information of the software system. In the iterative enhancement model, the new build creation i. Delivering your system in a big bang release, delivering it in incremental process over time is the action done in this model. The goal of software engineering is to provide models and processes that lead to the production of welldocumented maintainable software in a manner that is predictable.
Software maintenance free download as powerpoint presentation. Software maintenance sustains the software product throughout its life cycle from development to operations. All three models assume that the existing system has a complete. According to the former, the response to a maintenance request consists primarily of changing the code. Solved write short notes on following maintenance models. Requirements validation dependable software laboratory. Software maintenance maintenance models quickfix model this is basically. This work describes a controlled experiment comparing maintenance process derived from two different paradigms. Maintenance process varies considerably depending on the type of the software being maintained. Please provide justifications for your suggestions. Those existing models generate challenges because they.
Software engineering evolutionary model geeksforgeeks. The iterativeenhancement model is well suited for systems that have a long life and evolve over time. Software evolution and maintenance models slideshare. Software engineering evolutionary model evolutionary model is a combination of iterative and incremental model of software development life cycle. This happens in light of the fact that the product support group is unconscious of the necessities and outline documentation. Software maintenance chapter 14 software maintenance your system is developed it is deployed to customers what next. Viewing maintenance as reuseoriented software development.
Software evolution and maintenance chapter 3 evolution and maintenance models 2. The quickfix model this is basically an adhoc approach to maintaining software. Quick fix, iterative enhancement, reuse oriented etc. Pdf software maintenance is the continuous process of enhancing the. Introduction definition, program vs software, software processes, software life cycle models. The impact of reusing opensource software model in. We will carl these 1 the quick fix model, 2 the iterative enhancement model, and o the full reuse model. However, quickfix model can be used when time is a factor in the maintenance process. Detailed study of software maintenance models shivani. Software engineering b software reengineering c reverse engineering d reengineering view answer. Jan 06, 2014 software maintenance maintenance models quick fix model this is basically an adhoc approach to maintaining software. The advantage is that it performs its work quickly and at a low cost. This book will equip the reader with a sound understanding of maintenance and how it affects all levels of the software evolution process.
Iterative maintenance life cycle using extreme programming. Several maintenance models, such as boehm, quickfix, osborne, full reuse, iterativeenhancement and the isoiec 14764 and ieee1219 ieee standards for maintenance have been proposed. Build and fix, waterfall, prototype, iterative enhancement model, evolutionary and spiral model, rad model. There are some models for the maintenance of the software system, qquickfix model is one of them. Incremental model or iterative enhancement model in. The company of the software has a huge repository of reusable models. Investigating software maintenance challenges in small organizations raza hasan towson university. Consider the three maintenance process models in 2. Software maintenance maintenance models quickfix model fig. The period of time that starts when a software product is conceived and ends when the product is no longer available for use. Visual representation of a customizable software maintenance. Maintenance performed to correct faults in hardware or software, maintenance involves testing to detect a problem and injecting a fix without disturbing the rest of the system. All three models reuse the old system and so are reuseoriented. Reverse engineering, software reengineering, conguration management, documentation book prof.
Pankaj jalote, an integrated approach to software engg narosa publishing house, new delhi. Software maintenance models that are of most importance are. Quickfix model changes made at the code level, as easily as possible rapidly degrades the structure of the software iterative enhancement model changes made based on an analysis of the existing system. If we want to work with software systems at any level, we need to get to grips with the way software evolves. Software maintenance maintenance models quickfix model this is basically an adhoc approach to maintaining software. Modelling the process and lifecycle software engineering mcqs. It is a fire fighting approach, waiting for the problem to occur and then trying to fix it as quickly as possible.
The waterfall model performs each phase for developing complete software whereas the incremental model has phases similar to the linear sequential model arid has an iterative nature of prototyping. The pressure of the maintenance environment often dictates that a quick solution is found but, as we have seen, the use of the quickest solution can lead to more problems than it solves. Detailed study of software maintenance models shivani research scholar. The model explicitly supports reusability of codes and also accommodates other models, for example the quickfix model. The documentation is modified and then them modification is done on the code level. As a result, the structure of software degrade rapidly. The reuseoriented model, also called reuseoriented development rod, is a method of software development in which a program is refined by producing a sequence of prototypes called models, each of which is automatically derived from the preceding one according to a sequence of defined.
Maintenance categories of maintenance tasks major causes of problems reverse engineering management of maintenance activities ieee definition maintenance is the process of modifying a software system or component after delivery to correct faults, improve performance or. It has been repeated twice with undergraduate students and once with professional developers i. A software has to be maintained with some complicated errors. Iterative reengineering to compensate for quickfix maintenance. This is an ad hoc approach used for maintaining the software system. Software maintenance reliability engineering software. However, quick fix model can be used when time is a factor in the maintenance process. Mar 10, 2018 software evolution and maintenance models 1. Maintenance models iterative enhancement maintenance model quick fix model. Investigating software maintenance challenges in small. Common to most software and, more specifically, software evolution process models, is that they share a generality in abstracting and describing activities to be performed and resources to be used as part of the process.
Modelling the process and lifecycle software engineering mcqs 1which of the following is the understanding of software product limitations, learning system related problems or changes to be done in existing systems beforehand, identifying and addressing the impact of project on organization and personnel etc. He establishes a framework for classifying reusable objects and selecting a model. The impact of reusing opensource software model in software. The process of generating analysis and design documents is known as.
New age inter national publishers second edition 2. In this model changes at the code level are made as early as possible without anticipating future maintenance problems. Based on the following scenarios, suggest reuseoriented maintenance models out of quickfix model, iterative enhancement model and fullreuse model. Chapter 9 software maintenance linkedin slideshare. To overcome internal as well as external problems of the software, software maintenance models are proposed. Iterative enhancement software model assignment help. Y2k was the need to fix software that handled years as twodigit numbers when the calendar switched from 1999 99 to 2000 00. Todays agenda midterm return advanced testing techniques software maintenance software testing and maintenance 1 advanced testing techniques automatic test data generation symbolicconcolic execution, constraint solving testing of interactive systems, e. Incremental model or iterative enhancement model in software. This model states that sm basically consists of an iterative process. Software maintenance maintenance models quick fix model fig. Quickfix model changes made at the code level, as easily as possible rapidly degrades the structure of the software iterative enhancement model. Likewise, traditional models neglect to catch the transformative idea of the product. Once the software is delivered and installed at the clients premises, the process of maintenance begins.
Based on the following scenarios, suggest reuseoriented maintenance models out of quick fix model, iterative enhancement model and fullreuse model. Investigating maintenance processes in a frameworkbased. Software maintenance is a complex and life long process due to unstructured code, team morale, poor visibility of the project, lack of communication techniques and lack of proper test suite. Y2k problem is an interesting example of the role of maintenance in software.
The software life cycle typically includes a requirement phase, design phase. If a correction or an enhancement must be done very quickly, in a. In this model changes at the code level are made as early as possiblewithout anticipating future maintenance problems. Associated with the paradigm is a mechanism for setting measurable goals, making it possible to evaluate the process and the product and learn from experience. To overcome these problems, software maintenance models have been proposed, which include quick fix model, iterative enhancement model, and reuseoriented model. Iterative enhancement software model assignment help homework. Also, traditional models fail to capture the evolutionary nature of the software. Maintenance is needed to ensure that the software continues to satisfy user requirements. Quickfix model changes made at the code level, as easily as possible rapidly degrades the structure of the software iterative enhancement model changes made based on an analysis of the existing system attempts to control complexity and maintain good design. Basili has discussed in much detail example reuse process models that corres pond to these two extremes. The iterative enhancement model is well suited for systems that have a long life and evolve over time. Pdf extended iterative maintenance life cycle using extreme. Mostly software maintenance is carried out by a heavyweight method or even without any particular method. Analysis and design of algorithm pdf free download.
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