Tech subjects study materials and lecture notes with syllabus and important questions below. Software maintenance is widely accepted part of sdlc now a days. Rekayasa ulang reengineering restrukturisasi restrukturing sistem pakar pemeliharaan maintenance expert system b. Software configuration management in software engineering. To explain why software reengineering is a costeffective option for system. Sneed, software renewal a case study, ieee software, 71, pp8289, 1990. Preventive maintenance involves performing activities to prevent the occurrence of errors. Software configuration management is defined as a process to systematically manage, organize, and control the changes in the documents, codes, and other entities during the software development life cycle. Updating the software environment, reducing its deterioration over time, and enhancing features. Figure 1 summary of the software maintenance breakdown. Systems dont function in isolation typically they may interact with operating systems, dbmss, guis, network protocols, other external software packages, and various hardware platforms.
Software engineering process models by computer education for all unit 2 duration. 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. To put maintenance in its proper perspective requires considerable skill and experience, and in an important and ongoing aspect of system development. Ashok kumar, bakhshsish singh gill kurukshetra university, kurukshetra. A list of downloadable papers and articles on software maintenance.
Inadequate documentation of software design and structure loss of cultural knowledge of software due to staff turnover lack of allowance for change in original software design maintenance is unglamorous and may be viewed as a punishment task. It builds a program database and generates information from this. This study uses system dynamics modeling together with interviews of erp project members to better understand the technical and functional perceptions regarding customization versus business process reengineering to satisfy functionality gaps. Pdf the need of reengineering in software engineering. Software engineering is an engineering branch associated with development of software product using welldefined scientific principles, methods and procedures. It tends to reduce the software complexity thereby improving program understandability and increasing software maintainability. This perception is perpetuated by users submitting. In a software lifetime, type of maintenancemay vary based on its nature. Abstractmaintenance and reengineering terms are closely coupled with each other. This is not any functionality that performs in operations, but it develops to stop harmful activities like hacking. To explain why software reengineering is a costeffective option for system evolution to describe the activities involved in the software reengineering process to distinguish between software and data reengineering and to explain the problems of data reengineering. Programs, life cycles, and laws of software evolution.
These terms came from the world of hardware objects. A software product needs maintenance to support the new features that the users want or to change different types of functionalities of the. Software reengineering allow us to translate source code to new language, restructure our old code, migrate to a new platform such as clientserver, capture and then graphically display design information, and redocument poorly documented. It is abbreviated as the scm process in software engineering. Data and coding restricting as well as reengineering are the part of software maintenance. It is a way to transform the entire working system of an organization aiming. Perfective maintenance accounts for 50%, that is, the largest of all the maintenance activities. There are number of reasons, why modifications are required, some of them are briefly mentioned below. Explain software engineering, re engineering and reverse. When people shed thousands of bucks on software, they expect it to conform to their needs both present and future. The need of software engineering arises because of higher rate of change in user requirements and environment on which the software is working. But over years, changes in platform and operating system technologies made the old softwares unstable. And if any bugs come in the software, the company is responsible for solving all these bugs.
Models are new in the field of reengineering of object oriented. Spring 2005 ece450h1s software engineering ii our course project this is a brandnew software reengineering project, emphasizing on reusing, restructuring, refactoring largescale software systems, and team work. 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. Data reengineering is an expensive and time consuming process. Lingkup pemeliharaan perangkat lunak aktifitas pemeliharaan antara lain. As weve mentioned before, business process reengineering is no easy task. Software maintenance is that last step in the software development life cycle that does not get its fair share of attention. Maxim umdearborn system reengineering restructuring or rewriting part or all of a system without. Ppt software reengineering powerpoint presentation, free. Less formally, reengineering is the modification of a software system that takes place after it has been reverse engineered, generally to add new functionality, or to correct. Chapter 17 covers software reuse in far more detail than well go into on this course. Less formally, reengineering is the modification of a software system that takes place after it has been reverse engineered, generally to add new functionality, or to correct errors. Software maintenance in software engineering is the modification of a software product after delivery to correct faults, to improve performance or other attributes. The issues that are likely to cause big problems in the future are being addressed by preventive maintenance.
Ppt reengineering powerpoint presentation free to download id. Software reengineering systems, software and technology. For example, if a webapplication system with multimedia capabilities has been developed, modification may be necessary in countries where screening of videos over the internet is prohibited. The modification of a product, after delivery, to correct faults, to improve performance or other attr. Abstract maintenance and reengineering terms are closely coupled with each other. Data reengineering is different from software reengineering. Legacy systems are old software systems which are essential for business process support. Understanding the architecture of a legacy system openome, omnieditor 15%. Software maintenance and reengineering 1 software maintenance and reengineering. However, one study indicated that over 80% of maintenance effort is used for noncorrective actions. Large software it is easier to build a wall than to a house or building, likewise, as the size of software become large. The primary goal is to increase productivity with minimal mistakes. Baxter,michael mehlich, reverse engineering is reverse forward engineering, 1997 david eichman, factors in reuse and reengineering of legacy software. Archives of the journal of software maintenance many interesting papers but requires purchase 1998 present.
Preventive maintenance the probable future problems of the software are prevented by regularly updating and modifying the software which is known as preventive maintenance. Software reengineering consists of a combination of many subprocesses. Tutorials, articles, and papers software maintenance an overview a brief overview of the subject. Seg4110 advancedsoftwaredesignandreengineering topic r software maintenance. Because in software engineering, testing and maintenance are given, so there is no worry of its. Software re engineering source code software free 30. Software engineering covers not only the technical aspects of building software systems, but also management issues, such as directing programming teams, scheduling, and budgeting. Unlike business process management or improvement, both of which focus on working with existing processes, bpr means changing the said processes fundamentally. Software maintenance software is released to endusers, and within days, bug reports filter back to the software engineering organization. For custom systems, the costs of software maintenance usually exceed the software development costs. Software maintenance in software engineering tutorial 05. Definitions the act of keeping, or the expenditure required to keep, an asset in condition to perform efficiently the service for which it is used. So we practice software maintenance to improve the stability, quality and. This can be extremely timeconsuming, expensive and risky.
Software evolution strategies include maintenance, replacement, architectural evolution and, the topic of this chapter, software reengineering. Sonhaji,megahmulya, mubassiran, nasruddin, ari yanuar, rekayasaulang reengineering ira d. Software should be secure, means if you have delivered the software, then it should work for at least its given time or subscription. Business process reengineering or bpr is a strategy to help organizations work more efficiently. Now these entered the world of software and are well suitable for software systems. A fresh model for software maintenance a discussion of software. Software maintenance rengineering business process.
Software maintenance is an essential part of the software development life cycle. Perform reverse engineering, in order to obtain specifications. Software maintenance supports upgradations, if required, in a software system. Upgradations may be required due to changes in government regulations or standards. Software maintenance also facilitates future maintenance work, which may include restructuring of the software code and the database used in the software.
Chapter 29 maintenance and reengineering ppt video online. Maintenance on software goes beyond fixing bugs, which is one of the four types of software change. The samba software, which allows systems that are not running microsoft windows systems to share files with systems that are, is a classic example of software reverse engineering, since the samba project had to reverseengineer unpublished information about how windows file sharing worked, so that nonwindows computers could emulate it. Most softwares designed long ago are coded best, have good design and working well at that time. Free powerpoints free industrial engineering software. Implementation and software maintenance authorstream. To a large extent, it involves maintenance activities. Software documentation also provides information about how to use the product. Software engineering software maintenance geeksforgeeks. Fred brooks, in his key book the mythical manmonth, states that over 90% of the costs of a typical system arise in the maintenance phase, and that any successful piece of software will inevitably be maintained in fact, agile methods stem from maintenancelike activities in and around web based technologies, where the bulk of the capability comes from frameworks and. Software maintenance in software engineering tutorial 05 may.
It is not necessary to apply the entire reengineering process to achieve the benefit of reducing maintenance costs. Jul 31, 2016 software maintenance and reengineering john leiva. Reengineering is the property of its rightful owner. Software reverse engineering is a process of recovering the design, requirement specifications and functions of a product from an analysis of its code. Software maintenance sustains the software product throughout its life cycle from development to operations. Lehman was one of the first to recognise that software evolution is a fact of life. It stands for all the modifications and updations done after the delivery of software product. Companies rely on these systems so they must keep them in operation. Market conditions policies, which changes over the time, such as taxation and. Software engineering software maintenance software maintenance is the process of modifying a software product after it has been delivered to the customer. Before we begin discussing about software reengineering, let us get to software engineering first. Mar 18, 2017 software specification or requirements engineering is the process of understanding and defining what services are required and identifying the constraints on these services.
You get complete control on how your visuals are going to look like and how they are going to perform. 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. Software engineering is a discipline of engineering that is concerned with the design, development, testing, maintenance, and deployment of a software product. Software documentation is an important part of software process. Oct 15, 2012 software reengineering is a costeffective option for software system evolution.
The free sample above is from the powerpoint total productive maintenance tpm powerpoint sold on the full powerpoint at that website covers introduction and requirements for implementing a successful tpm in your organization. Business process reengineering diagram presentation. Concepts and practice software maintenance, it is the representation of those parts of the process specifically pertaining to the evolution of the software. Software engineering introduction to software engineering. The template set consists of 10 easy to use editable ppt slides. Software engineering software process activities part 3. As stated earlier, the need for software maintenance arises due to changes required in the software system. Especially presentations on business management, business reengineering, business strategy, process analysis, benefit from its use download free samples. The main purpose of software maintenance is to modify and update software application after delivery to correct faults and to improve performance. This report provides a general overview of the software reengineering process. Software engineering is a systematic approach to the design, development, operation, and maintenance of a software system. Tech student with free of cost and it can download easily and without registration need. Software engineering reverse engineering geeksforgeeks. A well written document provides a great tool and means of information repository necessary to know about software process.
With the emerging maintenance process models and extensive use of processes like reverse engineering and reengineering, software maintenance is considered as both a predelivery and a postdelivery activity. Thus, software maintenance services keep the solution hale and hearty. As a product it delivers the computing potential across network of hardware. Software reengineering is a costeffective option for software system evolution. The process of software evolution is driven by requests for changes and includes change impact analysis, release planning and change implementation. Penambahan atau perbaikan produk perangkat lunak adaptasi produk dengan lingkungan operasional yang baru hardware. Ppt software maintenance and reengineering powerpoint.
Find materials for this course in the pages linked along the left. May 29, 2015 data and coding restricting as well as reengineering are the part of software maintenance. Chapters 12 and are devoted to two areas closely related to maintenance, i. The reengineering of software was described by chikofsky and cross in their 1990 paper, as the examination and alteration of a system to reconstitute it in a new form. Business process reengineering diagram would help in illustrating business processes, business strategies, business priorities, business plans or proposals. Introduction to software engineeringreengineeringreverse.
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