It is a fire fighting approach, waiting for the problem to occur and then trying to fix it as quickly as possible. The main purpose of software maintenance is to modify and update software application after delivery to correct faults and to improve performance. Last we introduce a proposed maturity model specific to software maintenance. During the first step, the students drew up a process model of the maintenance.
Changes are implemented in the software system by following a software maintenance process, which is known as software maintenance life cycle smlc. Also, traditional models fail to capture the evolutionary nature of the software. Goals for each key practice area are also provided, and the model presented is fully aligned. Learn software development processes and methodologies from university of minnesota. According to yogesh 1 software maintenance process is costs 50% for perfective maintenance, 25% for adaptive maintenance, 21% for corrective maintenance and 4% for. Software development process models tutorial to software development process models in software testing in simple, easy and step by step way with syntax, examples and notes. Maintenance does not normally involve major changes to the systems architecture. This paper presents the software maintenance capability. When discussing the iterative method, the concept of incremental development will also often be used liberally. Software maintenance maintenance models quickfix model this is basically an adhoc approach to maintaining software. Software engineering software process and software.
Most parts of the icebergs are under water and cannot be seen. A comparison of traditional and maintenance models helps to highlight the differences between software development and software maintenance and shows why there is a need. For the love of physics walter lewin may 16, 2011 duration. Software process models a software process model represents the order in which the activities of software development will be undertaken. Chapter 4 slide 2 objectives to introduce software process models to describe three generic process models and when they may be used to describe outline process models for requirements engineering, software development, testing and evolution to explain the rational unified process model to introduce case. Perspectives on improving software maintenance department of. Impact of software comprehension in software maintenance. The mission of the sei software process program is to improve the quality of software development and maintenance processes, and to accelerate the maturity of software. Pdf software maintenance model through the development. Software maintenance a management perspective issues, tools, techniques, and trends phaneendra nath vellanky dissertation.
Need for maintenance software maintenance must be performed in order to. Rapid application development based on businessdataprocess modelling and 4gl implementation. Recognizing the importance of software maintenance and the limitations of process assessment models, which emphasize development over maintenance, an initial draft of a comprehensive maintenance evaluation model was published in 1996 zit96. Legacy systems are old software systems which are essential for business process support. A process model gives an abstract representation of a way in which to build software. In this work we seek to model software maintenance activities and design a commit. So, iterative waterfall model can be thought of as incorporating the necessary changes to the classical waterfall model to make it usable in practical software development projects. Preventive maintenance involves implementing changes to prevent the occurrence of errors. Software maintenance and process improvement by cmmi.
Introduction to mediation, moderation, and conditional. The software maintenance department that adopts the software maintenance maturity model smmm a model for the operation phase gradually implements the quality assurance qa processes and. A software process model is a simplified representation of a software process. On the basis of some advantages which have been noticed, but also of shortcomings of the existing models and concepts of maintenance, and through overall analysis of the. Perfective maintenance is concerned with the change in the software that occurs while adding new functionalities in the software. Software maintenance a management perspective issues.
Garth george, ravi kalyanasundaram, ganesh ayyer, phil trice, andy crowhurst, mario ferreira. Six sigma concept in the maintenance process of technical systems 95 ees and their motivation for work, which includes a radical change of culture of companies 4. Seek, relate, and collect relevant information during software maintenance tasks andrew j. Software maintenance capability maturity model smcmm. This report will address those concerns, outlining three steps you can take to ensure your cmms implementation is a smooth process that results in streamlined operations and cost savings. In this paper, i offer a primer on some of the important concepts and methods in mediation analysis, moderation analysis, and conditional process modeling prior to describing process, a versatile modeling tool freelyavailable for spss and sas that inte. Software maintenance process the series of actions taken to effect. It presents a description of a process from some particular perspective as. A software process model is an abstract representation of a software process. Software maintenance is the process of modifying a software product after it has been delivered to the customer. Software is quickly becoming integral part of human life as we see more and more automation and technical advancements. Hybrid models allow for new work environments and new means of work. The distribution of types of maintenance by type and by percentage of time consumed.
A software process framework for the sei capability maturity model. The software maintenance project effort estimation model. Software maintenance model through the development distinct stages. Different models and techniques are proposed by researchers. A comparison between five models of software engineering.
Each model represents a process from a specific perspective. The software maintenance process model alain april1, jane huffman hayes. Explore 10 different types of software development process. Concepts and practice maintenance process models effectively, they need to be seen in the context of traditional lifecycle models. Process models in software engineering walt scacchi, institute for software research, university of california, irvine. Introduction to mediation, moderation, and conditional process analysis a regressionbased approach andrew f. The waterfall model emphasizes that a logical progression of steps be taken throughout the software development life cycle sdlc, much like the cascading steps down an incremental waterfall.
However, generic models, as they aimed at more wide applications, are not always straightforward to implement. This book explores the domain of software maintenance management and provides road maps for improving software maintenance organizations. Coblenz, and htet htet aung abstractmuch of software developers time is spent understanding unfamiliar code. A software process framework for the sei capability. Software development processes and methodologies coursera. Hayes this decidedly readable, informative book is perfectly suited for a range of audiences, from the novice graduate student not quite ready for sem to the advanced statistics instructor. User support and software maintenance process model. Ian sommerville 2004 software engineering, 7th edition. Companies rely on these systems so they must keep them in operation.
Describe the rational unified process along with the significance of entry and exit criteria for all the processes. Ever since mankind starting exploring the oceans, icebergs have been a problem for seamen getting closer to the poles. Covers topics like introduction, bigbang model, codeandfix model, waterfall model, v model, incremental model etc. The iterative model is a particular implementation of a software development life cycle sdlc that focuses on an initial, simplified implementation, which then progressively gains more complexity and a broader feature set until the final system is complete. Machines, tools, parts, equipment, hardware, software, and so on equipment to be maintained.
The first part covers the theory of computer science and relevant mathematics. Royce in a paper published in 1970, the waterfall model is a software development process. Chapter 4 software process models chapter objectives introduce the generic concept of software engineering process models. Therefore i will not describe the individual steps again, because the description of the waterfall steps are suitable for the vmodel as well. A study on estimating software maintenance found that the cost of maintenance is as high as 67% of the cost of entire software process cycle. In a practical software development project, the classical waterfall model is hard to use. Waterfall incremental spiral discuss the chief programming team approach. A further development of the waterfall model led to the so called vmodel. Software engineers reference book provides the fundamental principles and general approaches, contemporary information, and applications for developing the software of computer systems.
This life cycle comprises seven phases, namely, problem identification, analysis, design, implementation, system testing, acceptance testing, and delivery phase. According to andrew jensen ko and bob uttl 65 individual difference. Software processes systems, software and technology. Software engineering software maintenance geeksforgeeks. On an average, the cost of software maintenance is more than 50% of all sdlc phases. In this section a number of general process models are introduced and they are presented from an architectural viewpoint. Software maintenance maturity model software verification and.
Pdf a decision model for software maintenance researchgate. This occurs because the software maintenance team is unaware of the requirements and design documentation. In contrast to software life cycle models, software process models often represent a networked sequence of activities, objects, transformations, and events that embody strategies for. Software maintenance software maintenance is the process of changing a system after it has been delivered. This thesis investigates the support for software maintenance in the process improvement framework cmmi capability maturity model integration created by. Many process models have been described and we will look at a number of such models. In contrast to software life cycle models, software process. For years, the importance of documentation has been stressed by educators, processes, quality models, etc. Maintenance is considered as part of the software development life cycle. It is not clearly defined what this deliverable is. Application maintenance and support best practices. In accordance with their commitment to the health, safety and welfare of the public, software engineers shall adhere to the. The spiral model is the most flexible and agile of all traditional software process models. It describes the sequence in which the phases of the software lifecycle will be performed.
It describes full maintenance maturity models organized by levels 1, 2, and 3, which allow for benchmarking and continuous improvement paths. The sm process includes a maintenance plan which contains software preparation, problem identification and find out about product configuration management. Software maintenance capability maturity model 3 many of the attributes and features of the first version of the modeland modernizing it with the recent appearance of the cmmi. Each traversal of the spiral usually results in a deliverable. Software maintenance definition what is meant by the term software maintenance. Our new version of the smcmm model presents four 4 software maintenance process domains and nineteen 19 software maintenance process areas. Software process models fundamental process activities the software engineering process is the set of activities and associated results that produce a software product. These models can be used to explain different approaches to software development.
Software evolution strategies include maintenance, replacement, architectural evolution and, the topic of this chapter, software reengineering. Productivityfactorson software maintenance in general, maintenance costs are dif. Modifying a program after it has been put into use. Software process models waterfall model, v model, spiral. Studies suggest that the software maintenance process begins without proper knowledge of the software system. Some models do not differentiate the productivity factors of software maintenance from those of.