Compare Waterfall And Spiral Life Cycle Model

This phase is critical to the success of the project. In this phase the purpose of the software or system should be determined. This is the phase where you can set the requirements that the software needs to fulfil when it is completed. Hence this stage is the main focus of project managers and stakeholders.

| An adaptive method typically uses a spiral development model, which builds on a series of iterations.

The Waterfall Method was first Process Model to be presented. It is likewise alluded to as a straight consecutive life cycle show. It is exceptionally easy to comprehend and utilize. In a waterfall model, each stage must be finished completely before the following stage can start. This sort of model is essentially utilized for the for the project which is little and there are no indeterminate prerequisites. Toward the finish of each stage, a survey happens to decide whether the project is on the correct way and regardless of whether to proceed or dispose of the project. In this model the testing begins simply after the advancement is finished. In waterfall display stages don 't cover.

Development moves from requirements, through design, implementation, testing, installation, troubleshooting, and ends up at maintenance. Each phase of development proceeds in proper order.

The rapid evolution in computer systems - both at hardware & software levels has allowed us to develop complex applications composed of millions of lines of code. This increase in complexity of software has necessitated that software developers ensure programs be of high quality, be developed within time & meet its specification. It was during college that I developed an interest in Software Engineering as a scientific discipline of developing applications. I became aware of the different software development methodologies and the various stages in

Insightfully mapping out the technological advancements in software development from its beginnings somewhere in the late 1940’s to the current modern age. There is more than enough compelling evidence that software technology has laid a strong impact on all economic and social aspects of our modern day living. Thus, a systematic approach towards high quality software development is required due to an increasingly quality oriented market and competitive business world.

Software development is the process of developing software through successive phases in an orderly way. This process includes not only the actual writing of code but also the preparation of requirements and objectives, the design of what is to be coded, and confirmation that what is developed has met objectives. It is the process of developing a product which under going different phases of development life cycle like documenting, testing and bug fixing through which the product outcome may be expected to be successful according to the requirements of the user.

Software Engineering is the whole process of developing a software product from beginning to end using an accepted methodology. One of the common and oldest methods is the Waterfall model which sets a linear sequence of progression from Requirements gathering and analysis, design, implementation, testing to maintenance (Philip L, Matthew, &Nick, 2002).

Software design – after identifying the problem and verifying all the necessary requirements design phase involves defining elements of the proposed system, security levels to be used and interfaces design. A prototype is built to visualize the full functionality of the system. This will help determine if the system will meet all the user requirements economically.

If it performs well they move on to the next stage to refine and tweak it for the final product. However if there we some problems they would have to identify it and fix it so that it functions properly. This method is something that all engineers use and will be a key aspect in my field so I had better get used to using it.

Secure software development cycle not only encompass the development and the implementation of a software but, also the processes that guaranty that a piece of software meets its requirement while minimizing expositions to malicious threats that could expose users and minimizing the cost of development (Microsoft.com)

The software development life cycle is the cycle in which software is developed. It is a process that has been improved upon as programming has expanded and become a bigger part of computers and networking. Programming is necessary in order to enable computers to perform in a desired manner, and those computers rely on that programming as instructions in order to function. Since computers rely on their programming to know how to function, the programming needs to be as efficient and flawless as possible, in order to produce ideal results. The software development life cycle is a tool used to help achieve ideal results.

Software Engineering is systematic approach to development, operation, maintenance and retirement of any software. Development of any software follows a series of steps known as the ‘Software Development Cycle’ (SDLC). Software testing is an important part of SDLC. Software testing is the major quality control measure employed during the software development. Its basic objective is to detect errors in the

At the Trinidad Gas Company (TGC), software development is done using an adaptive version of the Waterfall Methodology and the US Department of Justice Systems Development Life Cycle. The stages used by TGC in this mainly Waterfall Method involves the Initiation Phase, System Concept Development Phase, Planning Phase, Requirements Analysis Phase, Design Phase, Development Phase, Integration and Test Phase, Implementation Phase and Operations and Maintenance Phase. This methodology is a predictable, rigid and sequential design process, which means, that as each of the nine stages are completed, the developers move on to the next stage. In this sequential process there also exists a stage gate between each stage. This stage gate is simply a review of the project status to determine if to proceed or not. However, the stage gate approach is not always followed on many of the development projects undertaken by TGC. A brief description of each stage is mentioned below:

The traditional approach to software development can be illustrated through the waterfall model which is time tested and easy to understand. The waterfall model approaches software development in sequential manner, completing one activity before the other. It brakes up project in stages: requirement analysis, design, coding and testing, operation and maintenance (see fig. 1 below).