Software Methodologies Essay

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 preferred methodologies for managing a software’s lifecycle are a major factor in deciding how a firm reacts to market demands. The major SDLC frameworks followed are the waterfall model, Agile methodology (scrum) and Kanban. We will discuss this answer

The project is Agile, i.e. it can quickly adapt to changes in requirements. Hence, this method has high success rates.

In order to achieve successful results within established time-frames and budgets, project managers are likely to employ methodologies models. A project methodology is a model that aids managers to plan, design and implement their project goals. Project methodologies are helpful to project manager in any field, for instance, Niel Nickolaisen CIO at the Western Governors University, is an advocate for the agile software development methodology. As these models grants flexibility when dealing with stipulations and scope changes on a project. Needless to say the agile software development methodology is just one example of a varied assortment of methodologies, each with their strengths and weakness. As such, it is up to the project manager to decide which methodology fits their needs, as there isn`t a one fits all solution.

Using the waterfall approach the system developers will be able to focus on one piece of the system and move on each part separately. This will give the design team more time to focus on small sections of the new coding. Moving from one stage to the next means that each step has been checked thoroughly and is completed.

One of the initial steps in researching a problem is to know exactly what the problem is and compose a problem statement that unambiguously identifies and defines the problem to research. Sekaran (2003) said, “No amount of good research can find solutions to the situation, if the critical issue or the problem to be studied is not clearly pinpointed” (p. 69). The area of research for this paper focuses on software development, in particular, the study of agile software development methodologies and if these methodologies are successful in delivering software on time, within budget, and includes the requested features.

There is a cross section of projects ranging from a few weeks to a few years. There are also a wide cross section of customers, those capable of articulating clearly their requirements and the ones that are not clear on their requirements and the overall outcome to be achieved. The level of programmers within the Information Technology Department, where development work is executed, range from intermediate to advance or above average programming competence. The Waterfall approach is easier to manage and can be utilized for projects where there are clear requirements and the project is determined to be a long term one. Also, this method may be best suited given the organization’s requirements for thorough documentation and project accountability, when it comes to budget and cost. The Agile methodology can be used for projects where the requirements as well as the expectation from the end product are not as clear. The developers that are above average in terms of their competence can also use this method. In addition, the Agile method is also best suited for the projects that would require rapid

Since the method was developed for manufacturing and construction projects, it made sense in these industries that a portion of the project was fixed and unchangeable after a phase completed. Imagine the construction of a road, you prep and lay down a foundation then eventually lay down the final asphalt or concrete layer. It wouldn’t make sense to build in the ability to go back and change the foundation after the top layer was set. Obviously, software engineering is very different and therefore requires a much different approach to development. Besides slow turnaround, there were many other criticisms of the waterfall method. Some included redesign, rework, and retesting due to lack of knowledge about requirements when a project began. Also, due to the extremely long lead and delivery times, requirements changed or projects were dropped altogether leaving a company with a half-built loss on the balance sheet. An industry average put the estimated time for any software project using the Waterfall approach at 3 years. This was the environment that enabled a few forward-thinking developers to meet and design a new and better approach.

The traditional development method requires the definition and documentation of a stable set of requirements at the beginning of the project. It was inherited by other projects mainly related to construction which focused on the completion of one phase of production before moving on to the next phase, for example, laying the foundations of a building first and then proceeding with the further stages (Bowes 2014). Similarly, in Waterfall, the requirement gathering and designing work is done upfront before any coding takes place. The basic notion behind the traditional development approaches is that the projects are comparatively less complex, linear and predictable with clearly defined system boundaries which makes it simple to plan and follow without having any room for changes (Spundak 2014). Moreover, traditional development method depicts the requirements document as he key piece of documentation. The gathering of all the requirements, getting a sign off from the customer and then starting with the development of the project gives the project a limit of

Software process model is a step by step highly structured technique for designing and development of any software. There are various process models widely used for developing software. Process models give a guidelines regarding development of the software.

Several adaptations to the traditional approaches like agile, interactive, phased, extreme, etc have been made but each will be expected to meet the requirements of the project objectives, timeline, resources, and deliveries of the stakeholders. Other industry standard certifications like ISO9000 and regulations like the Sarbanes-Oxley have also influenced methodologies and processes used by several organisations (Kerzner, 2003). Generally, managing projects should involved five major process which include the project initiation, planning, execution, monitoring and controlling, and then project closing. See Fig. 2 below.

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.

Software engineering (SE) is the profession concerned with specifying, designing, developing and maintaining software applications by applying technologies and practices from computer science, project management, and other fields.

Software development is one of the highest demands in all over the world. We use software development techniques to solve the problems and to satisfy customers. Agile software development is a conceptual framework for software; it is also a group of software development methods based on iterative development. In 2001, agile software development was created by seventeen people with a desire to find alternative approaches to software development. The most important thing about agile methods are team work, conveying information to the team, face to face conversation, and satisfy the customer. There are various methodologies but I am going to describe the most popular ones.

The waterfall model consists of five phases such as requirements, Design, implementation, verification and maintenance. The method is a sequential design process where progress is seen as flowing downwards in a steadily manner, each development phase has its own distinct goals. The model is similar to water flowing down a cliff it can only flow in one way and cannot go back up it is the same with waterfall development ,after a development phase is completed it proceeds to the next development phase you cannot go back.