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Contrast methods of agile and waterfall
Contrast methods of agile and waterfall
Computer architecture history
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The waterfall methodology was first published by Winston W. Royce in 1970 as a sequential type of development process, and has been widely followed by many organizations in the IT industry. The waterfall methodology originally invented to build large-scale software systems, at that time most of software developer are working on multi-year projects and designed software for large computer systems that evolved relatively slowly. To develop large-scale software systems that involve by many developer, there is a need for a base programming paradigm or model that represent the whole project. The waterfall methodology was modeled according to hardware design projects that has been used for years which allow engineers to predict how pieces of a system would interact (Royce, 1970). The waterfall methodology flows in a downward fashion, similar to the way water flows downwards, take developers from the high-level initial requirements gathering through the system testing and product shipment. The waterfall methodology create blueprints or plans for the optimal process for software developme...
The Software Development Life Cycle is seldom used at my place of work. Unfortunately, recent developments in its use are deemed confidential. Due to this fact, this paper will examine in general terms one of the projects we are undertaking right now while at the same time attempting to maintain our confidentiality.
The project is going I am working is almost in the finish stage it is going into the production phase means getting to the live so that the users can able to use the application. After the developing the total code it will go to the testing phase where the testers will check the code is working properly without any errors actually the testers task is to check the code and submit to the developers if they found any errors or mistakes or else they will send the code to the production phase to deploy in the server to check the application.
SDLC( Software Development Life Cycle) , is a process used by the software industry to design, develop and test high quality software .The SDLC aim to produce good quality software that meets or exceeds the user’s expectation and reaches completion within time and cost estimates.
The Systems Development Life Cycle (SDLC) consists of phases used in developing a piece of software. It is the plan of how to develop and maintain software, and when necessary, replace that software. In 2007 during my hospital’s transition to a new software system, I was fortunate enough to be included in the process. I did not get involved until the implementation phase, but from then on, until now, I remain very active in the process. I decided to highlight the Waterfall Model of SDLC. The Waterfall Model is a “sequential development process” with each phase continuing in a line (McGonigle and Mastrian, 2012, p. 205).
Extreme Programming (XP) has spent the past decades under perpetual scrutiny by software developers fixated on up front design methodologies. The idea behind this is simple: if you want to make sure something is well built, you must design it well first, then put it together using reliable tools. For objects such as houses, cars, or tables, of which the design evolves gradually throughout decades, the methods of up front design suffice. Computer programs, on the other hand, are products often made for an industry that evolves at higher rates than any other. For this type of environment, more dynamic methods are required, which is why XP suits as a viable candidate. How design is altered from the traditional up front design method will be discussed.
A software development methodology is a standard proven process which helps programmers, architects, system analysts and others to make a well controlled and an efficient progress in the high quality software development.
2. Waterfall methodology relies heavily on initial requirements. However, if these requirements are faulty in any manner, the project is doomed.
In this case study, the work breakdown structure is classified as a waterfall methodology where it is more rigid whereas eXtreme programming (XP) would be considered under the agile approach. The work breakdown structure (WBS) is a hierarchical structure that outlines tasks needed to deliver the product or service.
The project management process involves activities related to planning, controlling, and decision making. The process defines the functions of managers along with the functions to enable the team members to perform their functions. Through the management process of a project, project manager can keep the project productive and focused. The project team possess the authority to discontinue the part of the entire project if it is not fulfilling the expectations. The project manager also has the responsibility of working with the consumer in the situations of requiring timeline, inappropriate estimations in budget, or delays in event.
Agile software development is a group of software development methods based on iterative and incremental development, where requirements and solutions evolve through collaboration between self-organizing, cross-functional teams. It promotes adaptive planning, evolutionary development and delivery, a time-boxed iterative approach, and encourages rapid and flexible response to change.
Project management has been firmly established as a concept for organizing, innovative as well as strategic endeavors. Software development organization follows some process when developing a software product. A key component of any software development process is the software development methodology on which the process is based. The particular methodology can significantly affect overall life cycle cost associated with a software product. The selection of the methodology is also based on the some predefined basic characteristics of the product under design. In this paper a fuzzy logic based approach is presented to assist organizations in making the decision regarding which software development methodology to select from Rational Unified
Given the time, it takes to develop large sophisticated software systems it not possible to define the problem and build the solution in a single step. Requirements will often change throughout a projects development, due to architectural constraints, customer’s needs or a greater understanding of the original problem. Iteration allows greater understanding of a project through successive refinements and addresses a projects highest risk items at every stage of its lifecycle. Ideally each iteration ends up with an executable release – this helps reduce a projects risk profile, allows greater customer feedback and help developers stay focused.
Rather than the long drawn out release cycles in the previously popular waterfall methodology, the agile methodology suggests regular short sprint release cycles called iteration. This allows the customers and stakeholders to have more involvement within the software development process. The iterative approach has become vastly effective in helping software developers improve their skills in estimating schedule for remaining tasks. Schedule estimation is one of the most difficult responsibilities for developers because software issues are common and are unpredictable by nature. By breaking the large requirements down into more manageable sub requirements, the agile process naturally promotes better estimation [1]. Agile methods are people-oriented rather than process-oriented, Qumer and Hender-son-Sellers [2] offer the following definition for the agility method: ‘‘A software development method is said to be an agile software development method when a method is people focused, communications-oriented, flexible (ready to adapt to expected or unexpected change at any time), speedy (encourages rapid and iterative development of the product in small releases), lean (focuses on shortening time frame and cost and on improved quality), responsive (reacts appropriately to expected and unexpected changes), and learning (focuses on improvement during and after product
Describe what happens in each of the five project management process groups (initiating, planning, executing, monitoring and controlling, and closing). Initiating a process is where the project begins. The tasks that are part of the initiation process are to identify and understand the project stakeholders, creating the project charter and holding a kick-off meeting. The project stakeholders are usually the project sponsor, the project team, the support staff and the internal customers.
As more companies that are leading technology are transforming from the traditional waterfall development model to an Agile software methodology, requirements engineering provides a process for software engineers to understand the problems they need to solve (Martin, Newkirk, & Koss, 2014). It is of key importance to understand the customer 's wants and needs before beginning designing or building the computer-based solution, as developing a solution that ignores the customer’s needs provides value to none of the parties involved. Thus, the intent of requirements engineering is to produce a written understanding of the customer 's problem (Pressman, 2010). Work products that are available to communicate this understanding include user scenarios, function and feature lists, analysis models, and specifications. This paper provides an evaluation of requirement patterns, an assessment of problem solving techniques most effective, a descriptive explanation of the patterns that includes a visual taxonomy, and an explanation of how the patterns identified are related.