Implementation Of Incremental Development Process

The Waterfall methodology was created by Winston Royce in 1970 and is based on the idea of "...progressing linearly from conception, through requirements, design, code and test..." (Neill, 2004). One of the main assumptions about this method is that the requirements will change very little if at all and that users will not be involved in development or be providing much feedback (Neill, 2004). A really good definition given by Laplante and Neil on this methodology is, "This model of development assumes that requirements are set, stable, and fully evolved before analysis begins, because development progresses linearly through the phases from requirements through system deployment. A phase is revisited only if artifacts created in that phase fail inspection review, or test. If you run into people who dispute this argument, remind them that water doesn 't flow up a waterfall" (10).

The incremental model is an intuitive approach to the waterfall model. Multiple development cycles take place here, making the life cycle a “multi-waterfall” cycle. Cycles are divided up into smaller, more easily managed iterations. Each iteration passes through the requirements, design, implementation and testing phases. A working version of software is produced during the first iteration, so you have working software early on during the software life cycle. Subsequent iterations build on the initial software produced during the first iteration.

Cost and resource needs are higher for traditional than Agile due to Waterfall’s sequential development phase of all requirements determined in the beginning, software design and finally implementation of master design. The need for all information up front takes substantial time to gather and the sequential design does not allow for project changes as the flow enters into the programming stage. With Agile, costs remain low because there exists an incremental and iterative approach to the project, meaning less time is used to collect all requirements up front, the

The Agile Methodology Principles makes the development much faster because the primary importance is given to the customer satisfaction and continuously delivers product. Even though requirements change at the ending phase the product is developed. The Agile development insist the self-organizing team which can create requirements, best architectures, best models. The Agile development promotes a distinct way of thinking to build things and methods to deliver continuous improvement of product. It facilitates to make best practices and decisions together. It a development to promote the adaptive planning, continuous improvement, evolutionary development and delivery, and required time to complete work. It encourages for rapid response to change in the whole development cycle. The project team prefers agile development to move in a creative and quick way. The project progress also depends on working software and project environment and support is provided and built by the individuals. They promote the sustainable environment. Constant attention is provided to the technical excellence and best models are given by the agile methodology. This principle helps the project team members

For the past years, waterfall process had been used by small and big companies as an approach to development process. This approach looks like a waterfall where it shows a steady downwards flow. This approach of development is the most mature and disciplined.

Focus is kept on the recurrence of condensed work cycles and also at the functional product yielded by the outcome, but in waterfall technique only once chance is been given to the development team to keep the project aspects right. But under the agile technique each and every feature of development including the design, requirements, is thoroughly checked under its lifecycle (Mahfuj et al, 2012). There is always some time to steer in another direction if a team stops at regular interval say after every two weeks and re-evaluates the project done.

The Waterfall method is essentially a sequential approach for software development. At each stage of a project, the all tasks and goals need to be completed before moving to the next stage with the goal of reducing error. The first signs of the Waterfall method

This paper describes Agile development methodologies and their benefits. Section II presents key elements of Agile. Section III presents benefits of Agile development methodologies over traditional waterfall methodologies.

Being agile means focused on delivering streamlined projects, not wasting time documenting every meticulous detail of a product. Instead of documentations, development teams begin working almost immediately on delivering small incremental products. These incremental products enable customers and design teams to perform frequent sanity checks, making sure they are not spending an inordinate amount of time (and money) on features that deliver little to no value.

Unlike waterfall development methodology, agile foresees the documentation but is initially unwilling to adapt such as adding a lot new facets to the development model. Gabe, M. said, "Agile methodologies attempt to capture and use the dynamics of change inherent in software development in the development process itself rather than resisting the ever-present and quickly changing environment.". Demand of traditional methods complete and accurate requirement before the development; agile methods presume that change is strict, unavoidable and must be embraced throughout the cycle of product development. Cao, L. and Ramesh, B. believes individuals who fill those roles are much more important than the roles that people fill. Fowler also believes that each talented individual brings something unique to a team that are developing the system and disagrees with the application of engineering

Waterfall development has distinct goals for each phase of development. This case because, due to difficulty of returning to an earlier phase. The model shown here is one of several more or less equivalent alternatives.

The disadvantages of the waterfall methodology we’re, in essence, “resolved” by implementing an incremental approach, with the introduction of the Agile methodology approach. The Agile approach introduced a much more simplistic design that included modules broken down into prioritized “sprints”. These sprints were recognized as a benefit to many project management teams as they allowed project managers the ability to perform enhanced evaluations on a much more frequent basis. This also provides increased opportunities for the discovery of bugs and customer feedback as completed phases are rolled out. One of the biggest disadvantages to the utilizing the Agile methodology is not having a clear and concise project deadline, the projects end result and budgetary confinements can vary greatly and the end result can be grossly different than what the original scoping plan had planned intended it to

The Waterfall or Traditional model is a linear or Sequential approach to develop a Product. In this methodology, each phase of the product’s life cycle takes place in sequence of events like : Requirement gathering ,Design ,Developing ,System Testing ,User Acceptance Testing(UAT),Fixing the issues and delivering the finished product whereas Agile is an iterative and team based approach to develop a product. In agile methodology, Instead of developing the product with all the features at once we divide the project into the smaller segments called sprints and incorporate new features in each iterations or sprints. Instead of extensive planning and design up front, agile methodologies allow changing requirements over time by using the cross functional teams who work on successive iterations to develop a product. In this model, the goal of each iterative

There was a need to change our software development process to something that was more transparent, collaborative and iterative. There were few options available that suited our needs however it wasn’t an over night change in methodology. We tried few options like Feature Driven Development methodology and also for Rapid Development methodology for some user experience focused applications. However the neither of those were successfully able to resolve effective work partition and collaboration between teams physically located in different geographical locations. This led us to try some other agile methodologies like Scrum and Extreme Programming. We were successful in resolving a lot of management issues with scrum. Extreme programming

The basic idea of this agile software development life cycle is to develop a system or a process through repeated cycles with smaller portions at a time. This will help the software developers to have a good understanding of what they have learnt during the development phases than the earlier versions of the system. The possible advantage of the iterative and the incremental model combined is that with each and every iteration design modifications are to be made and new