Agile Methodology In Software Development Pdf
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Agile Methodology In Software Development

AGILE methodology is a practice that promotes continuous iteration of development and testing throughout the software development lifecycle of the project. Both development and testing activities are concurrent unlike the Waterfall model The agile software development emphasizes on four core values.

Agile Methodology: The Complete Guide to Understanding Agile Testing. Over the past several years, a new way of creating software has taken the software development and testing world by storm: Agile. In fact, according to VersionOne’s State of Agile Report, as of 2018, 97% of organizations practice agile in some form. However, respondents. What is Agile Kanban Methodology? Lean development practices are based on the lean methodologies that have been used successfully in manufacturing processes. Kanban is a lean software development methodology that focuses on just-in-time delivery of functionality and managing the amount of work in pro. From those principles was born the agile methodology for software development. The roles in the agile methodology An agile software development process always starts by defining the users.

Agile software development methodology is an process for developing software (like other software development methodologies – Waterfall model, V-Model, Iterative model etc.) However, Agile methodology differs significantly from other methodologies. In English, Agile means ‘ability to move quickly and easily’ and responding swiftly to change – this is a key aspect of Agile software development as well.

Table Of Contents

Difference between Agile model and Non-Agile models
Disadvantages of the Agile Methodology

Brief overview of Agile Methodology

In traditional software development methodologies like Waterfall model, a project can take several months or years to complete and the customer may not get to see the end product until the completion of the project.
At a high level, non-Agile projects allocate extensive periods of time for Requirements gathering, design, development, testing and User Acceptance Testing, before finally deploying the project.
In contrast to this, Agile projects have Sprints or iterations which are shorter in duration (Sprints/iterations can vary from 2 weeks to 2 months) during which pre-determined features are developed and delivered.
Agile projects can have one or more iterations and deliver the complete product at the end of the final iteration.

Example of Agile software development

Example: Adobe is working on project to come up with a competing product for Microsoft Word, that provides all the features provided by Microsoft Word and any other features requested by the marketing team. The final product needs to be ready in 10 months of time. Let us see how this project is executed in traditional and Agile methodologies.

In traditional Waterfall model –

At a high level, the project teams would spend 15% of their time on gathering requirements and analysis (1.5 months)
20% of their time on design (2 months)
40% on coding (4 months) and unit testing
20% on System and Integration testing (2 months).
At the end of this cycle, the project may also have 2 weeks of User Acceptance testing by marketing teams.
In this approach, the customer does not get to see the end product until the end of the project, when it becomes too late to make significant changes.

The image below shows how these activities align with the project schedule in traditional software development.

With Agile development methodology –

In the Agile methodology, each project is broken up into several ‘Iterations’.
All Iterations should be of the same time duration (between 2 to 8 weeks).
At the end of each iteration, a working product should be delivered.
In simple terms, in the Agile approach the project will be broken up into 10 releases (assuming each iteration is set to last 4 weeks).
Rather than spending 1.5 months on requirements gathering, in Agile software development, the team will decide the basic core features that are required in the product and decide which of these features can be developed in the first iteration.
Any remaining features that cannot be delivered in the first iteration will be taken up in the next iteration or subsequent iterations, based on priority.
At the end of the first iterations, the team will deliver a working software with the features that were finalized for that iteration.
There will be 10 iterations and at the end of each iteration the customer is delivered a working software that is incrementally enhanced and updated with the features that were shortlisted for that iteration.

The iteration cycle of an Agile project is shown in the image below.

This approach allows the customer to interact and work with functioning software at the end of each iteration and provide feedback on it. This approach allows teams to take up changes more easily and make course corrections if needed. In the Agile approach, software is developed and released incrementally in the iterations. An example of how software may evolve through iterations is shown in the image below.

Agile methodology gives more importance to collaboration within the team, collaboration with the customer, responding to change and delivering working software.

Agile development methodology process fl…

Agile Methodology in Software Engineering

Agile development has become common place in IT industry.
In a recent survey over 52% of respondents said that their company practiced Agile development in one form or another.
Irrespective of your role in the organization, it has become essential to understand how Agile development works.
It is essential to also know, how it differs from other forms of software development

In traditional approach each job function does its job and hands over to the next job function. The previous job functions have to signoff before it is handed over the next job function authenticating that the job is full and complete in all aspects. For example, Requirement gathering is completed and handed over to design phase and it is subsequently handed over to development and later to testing and rework. Each job function is a phase by itself.

In Agile way of working, each feature is completed in terms of design, development, code, testing and rework, before the feature is called done. There are no separate phases and all the work is done in single phase only.

Agile Methodology in Testing

The objective of Agile Testing is to find defects and fix them immediately. This is in contrast to traditional model where testing occurs at the end
In Agile Testing, the testing team and development team are one, they are both simply called Team Members, where as in traditional model they are two different teams
In Agile Testing, development and testing are performed as part of a sequence of activities unlike traditional SDLC where development and testing are two separate phases
Agile Testing reduces costs since the defects are identified and fixed earlier

How To Do Agile Testing

In Agile testing, each release has a separate test plan which is prepared for that release
During the iteration 0 of the release, testing resources are identified, testing tools are setup, test planning, architecture etc are decided
The next stage is Construction where the main development and testing takes place. These are made up of different iterations for that release.
During the construction stage, the testing team performs testing to ensure that the software behaves as expected
The next stage after several iterations, is called the Release end game where production deployment of the application takes place, users are trained, system and acceptance testing are done
The final stage is the production where the application is supported operationally

Brief overview of Agile Methodology

Example of Agile software development

Agile Methodology in Software Engineering

Agile Methodology in Testing

How To Do Agile Testing

Difference between Agile model and Non-Agile models

Agile Methodology In Software Development