In this model changes at the code level are made as early as possiblewithout anticipating future maintenance problems. 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. The most expensive part of the software life cycle is a software maintenance process. Software maintenance reliability engineering software. Iterative maintenance life cycle using extreme programming. 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. Software maintenance process starts without proper information of the software system. 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. Due to time constraint, first identify the problem, modify the code to fix the defects as quickly as possible then modify the documentation. A software has to be maintained with some complicated errors. Detailed study of software maintenance models shivani research scholar. This is an ad hoc approach used for maintaining the software system.
Several maintenance models, such as boehm, quickfix, osborne, full reuse, iterativeenhancement and the isoiec 14764 and ieee1219 ieee standards for maintenance have been proposed. New age inter national publishers second edition 2. Analysis and design of algorithm pdf free download. 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.
Software maintenance maintenance models quickfix model this is basically. 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. This is the simplest model used for the maintenance of the software. There are some models for the maintenance of the software system, qquickfix model is one of them.
Basili has discussed in much detail example reuse process models that corres pond to these two extremes. The software life cycle typically includes a requirement phase, design phase. Once the software is delivered and installed at the clients premises, the process of maintenance begins. However, quick fix model can be used when time is a factor in the maintenance process. Delivering your system in a big bang release, delivering it in incremental process over time is the action done in this model. Based on the following scenarios, suggest reuseoriented maintenance models out of quickfix model, iterative enhancement model and fullreuse model. 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. The model explicitly supports reusability of codes and also accommodates other models, for example the quick fix model. The iterativeenhancement model is well suited for systems that have a long life and evolve over time. This model states that sm basically consists of an iterative process. The period of time that starts when a software product is conceived and ends when the product is no longer available for use. The documentation is modified and then them modification is done on the code level.
In the iterative enhancement model, the new build creation i. All three models reuse the old system and so are reuseoriented. 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. Pdf software maintenance is the continuous process of enhancing the. Detailed study of software maintenance models shivani. The quick fix model this is basically an adhoc approach to maintaining software. It is a fire fighting approach, waiting for the problem to occur and then trying to fix it as quickly as possible. Mar 10, 2018 software evolution and maintenance models 1. Effectiveness of scrum and kanban on agilebased software. Please provide justifications for your suggestions.
Viewing maintenance as reuseoriented software development. Software maintenance iterative enhancement model analysis. Also, the maintainability degrades faster when the quickfix model is used. 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. Various process models 5, 6, 10, 19, 49 supporting the evolution of software have been introduced. These models use different approaches and techniques to simplify the process of maintenance as well as to make is cost effective. Requirements validation dependable software laboratory. Software maintenance as part of the software life cycle comp180. Software maintenance sustains the software product throughout its life cycle from development to operations. To overcome these problems, software maintenance models have been proposed, which include quick fix model, iterative enhancement model, and reuseoriented model. He establishes a framework for classifying reusable objects and selecting a model. All three models assume that the existing system has a complete.
Quickfix model changes made at the code level, as easily as possible rapidly degrades the structure of the software iterative enhancement model. This book will equip the reader with a sound understanding of maintenance and how it affects all levels of the software evolution process. There are some models for the maintenance of the software system, qquick fix model is one of them. Y2k was the need to fix software that handled years as twodigit numbers when the calendar switched from 1999 99 to 2000 00. Changes are made at code level as early as possible without anticipating future problems. The impact of reusing opensource software model in software.
Pdf iterative reengineering to compensate for quickfix. 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. Maintenance is applicable to software that is developed using any software life cycle model for example, spiral or linear. Software engineering evolutionary model evolutionary model is a combination of iterative and incremental model of software development life cycle.
We will carl these 1 the quick fix model, 2 the iterative enhancement model, and o the full reuse model. Pankaj jalote, an integrated approach to software engg narosa publishing house, new delhi. Detailed study of software maintenance models shivan airo. According to the former, the response to a maintenance request consists primarily of changing the code. This work describes a controlled experiment comparing maintenance process derived from two different paradigms. If a correction or an enhancement must be done very quickly, in a. Software engineering evolutionary model geeksforgeeks.
This set of software engineering mcqs focuses on software maintenance 2. Software products change due to corrective and noncorrective software actions. Incremental model or iterative enhancement model in. Incremental model or iterative enhancement model in software. However, quickfix model can be used when time is a factor in the maintenance process. Reverse engineering, software reengineering, conguration management, documentation book prof. Software evolution and maintenance chapter 3 evolution and maintenance models 2. Software maintenance free download as powerpoint presentation.
This occurs because the software maintenance team is unaware of the requirements and design documentation. Likewise, traditional models neglect to catch the transformative idea of the product. Iterative enhancement software model assignment help homework. Modelling the process and lifecycle software engineering mcqs. Maintenance models iterative enhancement maintenance model quick fix model. 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. Iterative reengineering to compensate for quickfix. Computer science abstract software maintenance refers to the process of changing a system after it has been delivered and is in use. 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. Y2k problem is an interesting example of the role of maintenance in software.
Investigating maintenance processes in a frameworkbased. Mostly software maintenance is carried out by a heavyweight method or even without any particular method. Solved write short notes on following maintenance models. As a result, the structure of software degrade rapidly. Consider the three maintenance process models in 2. In this model changes at the code level are made as early as possible without anticipating future maintenance problems. This is basically an adhocapproach to maintaining software.
Software engineering b software reengineering c reverse engineering d reengineering view answer. Based on the following scenarios, suggest reuseoriented maintenance models out of quick fix model, iterative enhancement model and fullreuse model. In fact, we can identify at least three process models associated with maintenance depending upon the characteristics of the modification. This is the simplest model used for the maintenance of thesoftware. 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. It has been repeated twice with undergraduate students and once with professional developers i. Kagan erdil emily finn kevin keating jay meattle sunyoung park deborah yoon december 16, 2003.
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. Visual representation of a customizable software maintenance. This happens in light of the fact that the product support group is unconscious of the necessities and outline documentation. The company of the software has a huge repository of reusable models. Various software maintenance models are listed below. Chapter 9 software maintenance linkedin slideshare. Software maintenance refers to the process of changing a system after it has been delivered and is in. Software testing and maintenance 19 iterative enhancement model analyze existing system characterise proposed modifications redesign.
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. Jan 06, 2014 software maintenance maintenance models quick fix model this is basically an adhoc approach to maintaining software. Also, traditional models fail to capture the evolutionary nature of the software. The objective of this model is to identify the problem and then fix it as quickly as possible. Pdf extended iterative maintenance life cycle using extreme. Software maintenance models that are of most importance are. Maintenance process varies considerably depending on the type of the software being maintained. Some programs took that to mean that time had moved backwards.
The process of generating analysis and design documents is known as. 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. Software maintenance maintenance models quick fix model fig. Assessing the maintenance process through replicated. Write short notes on following maintenance models quickfix model anditerative enhancement model.
Quick fix, iterative enhancement, reuse oriented etc. Consider the three maintenance process models, proposed by basili in 3. Maintenance is needed to ensure that the software continues to satisfy user requirements. The impact of reusing opensource software model in. Software maintenance performed to make a computer program usable in a changed environment business rules, government policy, software. Software maintenance maintenance models iterative enhancement maintenance model quick fix model reuse oriented model.
Build and fix, waterfall, prototype, iterative enhancement model, evolutionary and spiral model, rad model. Iterative reengineering to compensate for quickfix maintenance. The incremental model also known as iterative enhancement model comprises the features of waterfall model in an iterative manner. With the quickfix model, maintainers start by modifying the source code, then test the new version, and finally modify the existing documentation. Iterative enhancement model d quick fix model view answer. With the quick fix model, maintainers start by modifying the source code, then test the new version, and finally modify the existing documentation. Investigating software maintenance challenges in small organizations raza hasan towson university. Software maintenance maintenance models quickfix model this is basically an adhoc approach to maintaining software. 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. Introduction definition, program vs software, software processes, software life cycle models.
The model explicitly supports reusability of codes and also accommodates other models, for example the quickfix model. The first time served to improve the material for successive replications. The quickfix model this is basically an adhoc approach to maintaining software. The advantage is that it performs its work quickly and at a low cost. Investigating software maintenance challenges in small. 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 maintenance models quickfix model fig. If we want to work with software systems at any level, we need to get to grips with the way software evolves. Software maintenance as part of the software life cycle. The iterative enhancement model is well suited for systems that have a long life and evolve over time. Software evolution and maintenance models slideshare. Also, the maintainability degrades faster when the quick fix model is used.
1620 1530 997 1592 848 694 546 224 1569 440 641 351 467 157 930 1525 1359 863 846 756 1143 706 718 784 987 993 951 439 1045 1494 1441 64 177 106 553 503 1031 237 301 487 307 122 553 57 714 1217 1397 838 750