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Agile ModelThe meaning of Agile is swift or versatile."Agile process model" refers to a software development approach based on iterative development. Agile methods break tasks into smaller iterations, or parts do not directly involve long term planning. The project scope and requirements are laid down at the beginning of the development process. Plans regarding the number of iterations, the duration and the scope of each iteration are clearly defined in advance.Each iteration is considered as...

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Incremental ModelIncremental Model is a process of software development where requirements divided into multiple standalone modules of the software development cycle. In this model, each module goes through the requirements, design, implementation and testing phases. Every subsequent release of the module adds function to the previous release. The process continues until the complete system achieved.The various phases of incremental model are as follows:1. Requirement analysis: In the first phase of the incremental model, the product...

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Spiral ModelThe spiral model, initially proposed by Boehm, is an evolutionary software process model that couples the iterative feature of prototyping with the controlled and systematic aspects of the linear sequential model. It implements the potential for rapid development of new versions of the software. Using the spiral model, the software is developed in a series of incremental releases. During the early iterations, the additional release may be a paper model or prototype. During later...

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RAD (Rapid Application Development) ModelRAD is a linear sequential software development process model that emphasizes a concise development cycle using an element based construction approach. If the requirements are well understood and described, and the project scope is a constraint, the RAD process enables a development team to create a fully functional system within a concise time period.RAD (Rapid Application Development) is a concept that products can be developed faster and of higher quality through:Gathering...

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Waterfall modelWinston Royce introduced the Waterfall Model in 1970.This model has five phases: Requirements analysis and specification, design, implementation, and unit testing, integration and system testing, and operation and maintenance. The steps always follow in this order and do not overlap. The developer must complete every phase before the next phase begins. This model is named "Waterfall Model", because its diagrammatic representation resembles a cascade of waterfalls.1. Requirements analysis and specification phase: The aim of...

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Software RequirementsThe software requirements are description of features and functionalities of the target system. Requirements convey the expectations of users from the software product. The requirements can be obvious or hidden, known or unknown, expected or unexpected from client’s point of view.Requirement EngineeringThe process to gather the software requirements from client, analyze and document them is known as requirement engineering.The goal of requirement engineering is to develop and maintain sophisticated and descriptive ‘System Requirements Specification’...

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Why Software Engineering is Popular?Here are important reasons behind the popularity of software engineering:Large software – In our real life, it is quite more comfortable to build a wall than a house or building. In the same manner, as the size of the software becomes large, software engineering helps you to build software.Scalability- If the software development process were based on scientific and engineering concepts, it is easier to re-create new software to scale an...

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What is Software Engineering?Software engineering is defined as a process of analyzing user requirements and then designing, building, and testing software application which will satisfy those requirements.Let's look at the various definitions of software engineering:IEEE, in its standard 610.12-1990, defines software engineering as the application of a systematic, disciplined, which is a computable approach for the development, operation, and maintenance of software.Fritz Bauer defined it as 'the establishment and used standard engineering principles. It helps...

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History Of SoftwareThe Early Days of SoftwareComputer scientist Tom Kilburn is responsible for writing the world’s very first piece of software, which was run at 11 a.m. on June 21, 1948, at the University of Manchester in England. Kilburn and his colleague Freddie Williams had built one of the earliest computers, the Manchester Small-Scale Experimental Machine (also known as the “Baby”). The SSEM was programmed to perform mathematical calculations using machine code instructions. This first...

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Types Of SoftwaresThe two main types of software are system software and application software.System software is a type of computer program designed to run a computer's hardware and application programs. System software coordinates the activities and functions of the hardware and software. In addition, it controls the operations of the computer hardware and provides an environment or platform for all the other types of software to work in. The best-known example of system software is...

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SoftwareSoftware is a set of instructions, data or programs used to operate computers and execute specific tasks. Opposite of hardware, which describes the physical aspects of a computer, software is a generic term used to refer to applications, scripts and programs that run on a device. Software can be thought of as the variable part of a computer, and hardware the invariable part.Software is often divided into categories. Application software refers to user-downloaded programs that...

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