Project Management Life Cycle The Waterfall Model was first introduced as a Life Cycle model for projects in industries such as construction and manufacturing. Its basic concept revolves around the steady and sequential downward flow of each cycle phase, as depicted by Winston Royce, almost 4 decades ago. This model is referred to as the Pure Waterfall Model, and today there is a new version which is known as the Modified Waterfall Model. The Pure Waterfall Model This is the old and more commonly used model.
Testing Phase Maintenance Phase The main change is that the phases in this advanced model are permitted to overlap. Because the phases overlap, a lot of flexibility has been introduced.
At the same time, a number of tasks can function concurrently, which ensures that the defects in the software are removed in the development stage itself and the overhead cost of making changes to the software before implementation is saved. At the same time, making changes to the basic design is also possible, as there are a number of phases active at one point of time.
In case there are any errors introduced because of the changes made, rectifying them is also easy. This helps to reduce any oversight issues. The diagram of this model does not differ from the traditional waterfall model diagram, as to every phase of the model a verification and validation step has been added.
The other advantage is that it is a more relaxed approach to formal procedures, documents, and reviews. It also reduces the huge bundle of documents. Due to this, the development team has more time to devote to work on the code and does not have to bother about the procedures.
This, in turn, helps to finish the product faster. Like everything has two sides, this model also has a drawback. It indeed does lend flexibility to the software development process, but tracking the progress on all the stages becomes difficult, as a number of phases are underway at the same time.
Also, it has not done away with the stages from the traditional model. Therefore, there is some dependency on the previous stage, which continues to exist.
This dependency adds to the problem and the project can become a complicated at times. The development team may be tempted to move back and forth between the stages for fine tuning.
This results in delay in project completion. However, this drawback can be removed, if certain benchmarks are set up for every phase. Benchmarking helps to ensure the project is on schedule and does not go haywire.
In spite of the drawbacks, this model is extensively used in the software industries. Most of the drawbacks from the traditional design have been taken care of and this has made it easier to work in the advanced stages. · The most used models are Waterfall models used for generally small scale projects and single release based software products, whereas the Prototyping Model is used for developing large scale products generally developed in multiple parts rather leslutinsduphoenix.com THESIS Sales System.
Final ISCA. MODIFIED. WATERFALL MODEL MODIFIED WATERFALL MODEL The modified waterfall uses the same phases as Documents Similar To Modified Waterfall Method. Point of Sale System. Uploaded by.
Kaung Htet Aung. patient information system. Uploaded by. What is The V-Model Development Methodology? The V-Model of software development uses a modified waterfall to provide a sequential development methodology that has feedback mechanisms between the pre-development and post-development phases of the lifecycle.
Instead of moving down in a linear way, the process steps are bent upwards after the coding phase, to form the typical V leslutinsduphoenix.com://leslutinsduphoenix.com Following this model type, a project is implemented step-by-step in accordance with the precise sequence: requirements gathering and study, software design, software development, software testing and software leslutinsduphoenix.com Waterfall model is flexible and some phases can intersect.
The waterfall model is a way of organizing a project from the moment of mental conception to the maintenance after deployment. There are six steps usually organized in a waterfall looking diagram – hence the name.
To enhance it further, modified waterfall model came into existence. Techspirited Staff. The waterfall model is the sequential approach implemented in software development.
In this software development process, there is a steady flow from one phase into the other. The flow represents a waterfall, hence the name of the model.