Software Development Methodologies For Software Engineering

It has been observed that in software development, change is unavoidable and must be accommodated for in the life cycle. A number of alternative process models have been introduced in order to attempt to fix the issues in the Waterfall model. An early modification to the standard Waterfall method introduced prototyping as a feedback and discovery mechanism to identify misunderstandings and omissions early on in the process (Neill, 2004). Other process models attempted to further get rid of the risks of misunderstandings by breaking down projects

Waterfall method is one of the traditional software developing method that has been implementing for decades. Usually, clients have requests, then software developers create an initial paln; after client approves the plan, developers follow through the plan; at the end, developers test and finish the task. Upon clients’ additional requests or tests, developers add up the extra features, but in most of the case, it would be too late or too hard to change. The entire process is not very communicative or translucent since clients and developers generally meet just once or twice throughout the project. In the article Why Making Software is so Difficult the author mentioned that software production is very

As waterfall model has many advantages it is carrying a lot of disadvantages. It is hard to make changes after testing the stage. Once an application is in the testing stage, it is very difficult to go back and change something that was not well-thought out in the concept stage. The software never work tile the few last steps and it is very hard to identify the errors at the beginning. It is gambling operation to make a software and successful of the software is unknown. It is not suitable for a large complex project.

The success of a software development project greatly depends upon which process model is used.This paper presents a description of various software engineering process models. It emphasizes on the need of using appropriate model as per the application to be developed.In the paper description of following seven models are given namely Waterfall,Prototype,Rapid application development,Incremental,spiral, Buid and fix and V-shaped. Advantages and disadvantages of these models have been given in this paper. our aim is to create a reliable and cost effective software and these models provides us a way to develop them.In the paper a comparative study of various models have been made along with their defects and features.

The waterfall methodology is one of the most prominently recognized and most utilized methods in project management. Whether you’re using the waterfall methodology to manage a project or in some other fashion, let’s say for example, in software development, it works the same in producing a product – in a sequential manner and design, and in a series of stages that follow each other one after another. This means, once a person completes one step they move onto the next step and not before. As this process is sequential, once a step has been completed, the person cannot go back to a previous step – not without scratching the whole project and starting from the beginning. There’s no room for change or error, so a project outcome and an extensive plan must be set in the beginning and then followed carefully.

There are many different software development methodologies for a software project to choose from, each of them has their own pros and cons, which one is the right one for your organization. In this article, we will discuss the different types of project environments that are available, first we will start with the Agile methodology pros and cons and then we will talk about the suitability of the method with different project environments.

The object orientated software engineering approach or the waterfall approach is an example of an object-modelling language. In this essay I will detail the advantages & disadvantages of using this methodology. I will also compare and contrast this methodology with an alternative approach of software engineering which is the agile or scrum approach.

Agile software development is a conceptual framework for software engineering that promotes development iterations throughout the life-cycle of the project. It provides opportunities to assess the direction of a project throughout the development lifecycle. Its objectives are as it focuses on customer value. It creates a flow of value to customers by “chunking” feature delivery into small increments. Software developed during one unit of time is referred to as an iteration, which may last from one to four weeks. Agile model believes that every project needs to be handled differently and the existing methods need to be suitable for the project requirements. In

In the software engineering field, there are many software development methodologies. In recent times, Agile methodologies have become popular and are being widely used by companies such as IBM. Agile’s origins began in the 90s thanks to the likes of Rational Unified Process (1994) and Scrum (1995), but when 17 software developers met in Utah in February 2001 and created the Agile Manifesto, they became collectively referred to as “Agile Methodologies”. This manifesto was created to answer the failures of traditional Software Development Lifecycle Models (such as the Waterfall model). Agile System Development is a collection of methodologies in which combines iterative and incremental development.

The waterfall model of software engineering for the systems development life cycle model is the most popular version. Often considered classic approach to life cycle of systems development , linear and sequential waterfall model describes the development system. Waterfall development objectives are different for each stage of a development .Imagine a waterfall on the cliff of an alp. Water has flowed over the edge of a steep mountain side and has started walking down , it cannot turn back. It is same as the waterfall development. Once a phase of development is completed, there is no turning back when the development proceeds to the next phase.

Traditionally, this organization has utilized a waterfall methodology to develop software. The two main reasons for this are that is a well vetted methodology, and it provides a very well defined scope that we can use to manage projects and stay within a defined budget. As the business climate becomes increasingly volatile, the benefits of using this methodology have quickly become detractors. As requirements shift, the waterfall methodology locks clients in to a specific predetermined scope. While this is a good way to control budget, it does not provide the flexibility required to meet client needs. Several new software development methodologies have gained traction in the industry over the past few years. However, none of them provides both the flexibility needed by the end user and the rigidity and control needed to manage both the scope and budget of a project in order to set client expectations appropriately. This proposal recommends a hybrid approach that utilizes three of the more flexible software

Waterfall model: This model has five phase like requirements, design, implementation, verification and maintenance. It is a sequential process. It is originated from manufacturing and construction industries. It is proposed by Royce. This model is series of cascading steps that covers actual development process of the project and has iteration between its steps. The main problem with this model is that rigidity of the model and there is no iteration between any other stages other than adjacent stages. As we all know that web is the fastest mode of developing technology, therefore a model which will automatically adapt to the changes taking place in the environment are to be preferred.

The waterfall method is a linear, sequential, non-iterative process for software development first mentioned by Herbert Benington in 1956. The software development life cycle (SDLC) is defined by Ruparelia as “a conceptual framework or process that considers the structure of the stages in-volved in the development of an application from its initial feasibility study through to its deploy-ment in the field and maintenance (Ruparelia, 2010, p. 8).’’ This method is so named “waterfall’’ because the stages of the SDLC cascade down through the stages of product consideration, re-quirements, analysis, design, development, testing, implementation and review/maintenance.

I selected this topic because it is vital to anyone who wants to develop software to understand the various types of software development models. Software development models guide developers from start to finish for any given project. They encompass areas of development such as research, planning, design, coding, testing, setup, and maintenance (Liviu, 2014, pg.39-40). Various software models exist so it is also important for developers to know how to select the proper one that will be the most effective for their particular project. Although many models exist, for this review I will focus on two of the most commonly used software development models, which are the waterfall model, and the incremental model. HOW EACH MODEL WORKS. In this

There are several methods of software development, out of these most practically used are agile methodology and the plan driven approach this is a summary of both the approach and their comparison and compatibly with the user requirement for the better results and hybrid technique which resulted in combination of agile methodology and plan driven method with a comprehensive spectrum of tools and options