What Is a Software Development Process in Java

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What Is a Software Development Process
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A software development process provides guidance on how to develop software successfully Such guidance may cover the entire spectrum of activities associated with software development The process might manifest itself in the form of proven approaches, best practices, guidelines, techniques, sequencing, and so on
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Whether formal or informal, the software development process ultimately employed has a profound impact on the success of a software project An ad hoc approach might work well for a small project, but it might lead to chaos for a large project and hence greatly impact the overall schedule Similarly, a bureaucratic software development process may lead to frustration and bog down even the best team
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Overview of Popular Approaches to Software Development
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There are numerous processes for developing software Some of the more prevalent/popular ones are discussed in the following sections
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The Just-Develop-It Approach
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The just-develop-it approach is characterized by a general lack of formality and almost nonexistent process or ceremony surrounding software development activities The software developer has the key role, which is perhaps differentiated by experience and expertise in the area The sole focus of the development team is to complete the software project in the best way it can, using whatever means are afforded by the technologies at its disposal Some up-front design work might be undertaken, but that is largely dependent on the initiative and preferences of the software developer who is responsible for the project
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In such an approach, the overall design of the software exists as part of the software In other words, there is a one-to-one bidirectional ma pping between the architecture, design, and implementation The overall quality of the software is largely dependent on the developers involved in the project Documentation, in general, is relatively unimportant Instead, the project relies on the continued availability of the same or equally skilled developers, so they can continue to evolve or maintain the software
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Overall, this means that the software may range from an excellent piece of work that is highly flexible and evolvable to very poor quality s oftware that is inflexible and unable to accommodate even the simplest changes in requirements In a nutshell, the overall success rate is unpredictable at best and repeatability from one project to the next (or even from one project phase to the next) is mostly dependent on luck
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As it turns out, a large number of software development efforts today still rely on this development approach! Perhaps this is a manifestation of the compressed Internet delivery time pressures or simply the result of the software industry being in its infancy Either way, the phenomenon is very real
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The Waterfall Process
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The waterfall approach has been used extensively in the past and continues to be popular The idea is to segment the development into sequential phases (eg, requirements, analysis, design, implementation, test) This works well for small projects and for projects where the requirements are stable and relatively fixed, the problem domain is well understood, and the solution has been proven on similar projects in the past
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Figure 5 - 1
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depicts the waterfall process
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Figure 5-1 The waterfall process
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The Iterative Process
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Unfortunately, most software projects nowadays do not meet the criteria for utilizing the waterfall approach Requirements are constantly changing; projects often break new ground by tackling novel problems and trying out cutting-edge technology, and so on The iterative development approach, which is based on Boehm's spiral model, is primarily aimed at addressing these issues The idea is to reduce risk early in the project by going through the identified sequence of activities (requirements, analysis, design, etc) multiple times and
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revisiting each of the key activities in a planned manner Each iteration ends with an executable release Among other advantages, this approach permits early identification of issues with respect to inconsistent requirements, enables end user involvement and feedback, provides a higher confidence level in the state of the project, and so on
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Figure 5 - 2
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