This occurs because the software maintenance team is unaware of the requirements and design documentation. Software maintenance maintenance models iterative enhancement maintenance model quick fix model reuse oriented model. He establishes a framework for classifying reusable objects and selecting a model. Maintenance models iterative enhancement maintenance model quick fix model. Consider the three maintenance process models in 2. Detailed study of software maintenance models shivani research scholar. Software maintenance chapter 14 software maintenance your system is developed it is deployed to customers what next. According to the former, the response to a maintenance request consists primarily of changing the code.
This set of software engineering mcqs focuses on software maintenance 2. The incremental model also known as iterative enhancement model comprises the features of waterfall model in an iterative manner. In this model changes at the code level are made as early as possible without anticipating future maintenance problems. This work describes a controlled experiment comparing maintenance process derived from two different paradigms. Software maintenance maintenance models quickfix model fig. Investigating maintenance processes in a frameworkbased.
Investigating software maintenance challenges in small organizations raza hasan towson university. 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. Investigating software maintenance challenges in small. Iterative maintenance life cycle using extreme programming. Various process models 5, 6, 10, 19, 49 supporting the evolution of software have been introduced. This model states that sm basically consists of an iterative process. The company of the software has a huge repository of reusable models. There are some models for the maintenance of the software system, qquickfix model is one of them. The quick fix model this is basically an adhoc approach to maintaining software. Consider the three maintenance process models, proposed by basili in 3.
We will carl these 1 the quick fix model, 2 the iterative enhancement model, and o the full reuse 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 changes made based on an analysis of the existing system. Software maintenance as part of the software life cycle. Changes are made at code level as early as possible without anticipating future problems. Reverse engineering, software reengineering, conguration management, documentation book prof. Modelling the process and lifecycle software engineering mcqs.
Viewing maintenance as reuseoriented software development. Iterative enhancement model d quick fix model view answer. The period of time that starts when a software product is conceived and ends when the product is no longer available for use. Maintenance process varies considerably depending on the type of the software being maintained. Software testing and maintenance 16 quickfix model problem found fix it. If a correction or an enhancement must be done very quickly, in a. Software engineering evolutionary model evolutionary model is a combination of iterative and incremental model of software development life cycle. Y2k was the need to fix software that handled years as twodigit numbers when the calendar switched from 1999 99 to 2000 00. Software maintenance maintenance models quickfix model this is basically. Jan 06, 2014 software maintenance maintenance models quick fix model this is basically an adhoc approach to maintaining software. Some programs took that to mean that time had moved backwards.
In this model changes at the code level are made as early as possiblewithout anticipating future maintenance problems. Quick fix, iterative enhancement, reuse oriented etc. 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. Kagan erdil emily finn kevin keating jay meattle sunyoung park deborah yoon december 16, 2003. This is basically an adhocapproach to maintaining software. The impact of reusing opensource software model in software. Pdf software maintenance is the continuous process of enhancing the. Also, traditional models fail to capture the evolutionary nature of the software. Several maintenance models, such as boehm, quickfix, osborne, full reuse, iterativeenhancement and the isoiec 14764 and ieee1219 ieee standards for maintenance have been proposed. 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. Due to time constraint, first identify the problem, modify the code to fix the defects as quickly as possible then modify the documentation. As a result, the structure of software degrade rapidly. Maintenance is applicable to software that is developed using any software life cycle model for example, spiral or linear.
Basili has discussed in much detail example reuse process models that corres pond to these two extremes. Software evolution and maintenance models slideshare. It has been repeated twice with undergraduate students and once with professional developers i. Software evolution and maintenance chapter 3 evolution and maintenance models 2. Iterative reengineering to compensate for quickfix. These models use different approaches and techniques to simplify the process of maintenance as well as to make is cost effective. 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. This is the simplest model used for the maintenance of the software. Quickfix model changes made at the code level, as easily as possible rapidly degrades the structure of the software iterative enhancement model. Visual representation of a customizable software maintenance. Software maintenance free download as powerpoint presentation. Effectiveness of scrum and kanban on agilebased software. Software maintenance reliability engineering software.
Pdf iterative reengineering to compensate for quickfix. Build and fix, waterfall, prototype, iterative enhancement model, evolutionary and spiral model, rad model. Y2k problem is an interesting example of the role of maintenance in software. Software maintenance as part of the software life cycle comp180. Mar 10, 2018 software evolution and maintenance models 1. A software has to be maintained with some complicated errors. Iterative enhancement software model assignment help homework.
The iterativeenhancement model is well suited for systems that have a long life and evolve over time. The documentation is modified and then them modification is done on the code level. To overcome these problems, software maintenance models have been proposed, which include quick fix model, iterative enhancement model, and reuseoriented model. The model explicitly supports reusability of codes and also accommodates other models, for example the quick fix model. It is a fire fighting approach, waiting for the problem to occur and then trying to fix it as quickly as possible. 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. Analysis and design of algorithm pdf free download. There are some models for the maintenance of the software system, qquick fix model is one of them. Software maintenance sustains the software product throughout its life cycle from development to operations.
Software maintenance performed to make a computer program usable in a changed environment business rules, government policy, software. The model explicitly supports reusability of codes and also accommodates other models, for example the quickfix model. Software engineering b software reengineering c reverse engineering d reengineering view answer. Requirements validation dependable software laboratory. 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. The quickfix model this is basically an adhoc approach to maintaining software. 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. Solved write short notes on following maintenance models. With the quick fix model, maintainers start by modifying the source code, then test the new version, and finally modify the existing documentation.
Pdf extended iterative maintenance life cycle using extreme. Iterative reengineering to compensate for quickfix maintenance. Please provide justifications for your suggestions. Assessing the maintenance process through replicated. The impact of reusing opensource software model in. 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. In fact, we can identify at least three process models associated with maintenance depending upon the characteristics of the modification. To beat these issues, software maintenance models have been proposed. The first time served to improve the material for successive replications.
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 quickfix model this is basically an adhoc approach to maintaining software. Based on the following scenarios, suggest reuseoriented maintenance models out of quickfix model, iterative enhancement model and fullreuse model. Incremental model or iterative enhancement model in software. However, quick fix model can be used when time is a factor in the maintenance process. Write short notes on following maintenance models quickfix model anditerative enhancement model. Software maintenance maintenance models quick fix model fig. Also, the maintainability degrades faster when the quick fix model is used. Delivering your system in a big bang release, delivering it in incremental process over time is the action done in this model. Those existing models generate challenges because they. This is the simplest model used for the maintenance of thesoftware. 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.
However, quickfix model can be used when time is a factor in the maintenance process. This is an ad hoc approach used for maintaining the software system. 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. Maintenance is needed to ensure that the software continues to satisfy user requirements. Once the software is delivered and installed at the clients premises, the process of maintenance begins. Various software maintenance models are listed below. The advantage is that it performs its work quickly and at a low cost. Based on the following scenarios, suggest reuseoriented maintenance models out of quick fix model, iterative enhancement model and fullreuse model.
Software maintenance refers to the process of changing a system after it has been delivered and is in. If we want to work with software systems at any level, we need to get to grips with the way software evolves. In the iterative enhancement model, the new build creation i. Detailed study of software maintenance models shivan airo. The most expensive part of the software life cycle is a software maintenance process. Software engineering evolutionary model geeksforgeeks. Pankaj jalote, an integrated approach to software engg narosa publishing house, new delhi. 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. Software maintenance process starts without proper information of the software system. Mostly software maintenance is carried out by a heavyweight method or even without any particular method.
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. Software maintenance models that are of most importance are. Detailed study of software maintenance models shivani. This happens in light of the fact that the product support group is unconscious of the necessities and outline documentation. Incremental model or iterative enhancement model in. Software testing and maintenance 19 iterative enhancement model analyze existing system characterise proposed modifications redesign. 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. New age inter national publishers second edition 2.
The objective of this model is to identify the problem and then fix it as quickly as possible. To overcome internal as well as external problems of the software, software maintenance models are proposed. 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. The iterative enhancement model is well suited for systems that have a long life and evolve over time. 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. Iterative enhancement software model assignment help. All three models reuse the old system and so are reuseoriented. Software maintenance iterative enhancement model analysis. Also, the maintainability degrades faster when the quickfix model is used. Likewise, traditional models neglect to catch the transformative idea of the product. Introduction definition, program vs software, software processes, software life cycle models.