The initial and mandatory step before starting any software development project is requirement gathering and deciding which software model to follow. It’s better to decide early which SDLC model is most suitable or required by the client for the software project. A developer can divide the task among the team members by determining the SDLC model.
The waterfall model in software engineering is the first software development life cycle model, invented by Herbert D. Benington in 1956. According to Mr. Herbert informally organized the phase of the waterfall model based on the task's priority.
Later, in 1970, Winston W. Royce not only formally sketched a final diagram of the waterfall model of software development life cycle but also set a chronology phase of the waterfall development model.
The waterfall model in software engineering is also called the linear sequential lifecycle model. In this blog, you’ll discover some essential information about the classical waterfall model in software engineering.
The Waterfall Model is traditional and follows a linear sequential approach to construct software development.
Waterfall model is the earliest software development methodology used for software development. Even though there are other software models, the waterfall model is still used in certain situations. However, it has largely been replaced by more flexible and iterative approaches like Agile, V model, spiral, etc.
The biggest drawback of the waterfall model is that you cannot go back to the previous phase to perform any changes or anything else.
Below you’ll see the diagram of waterfall model:
The Waterfall Model is the oldest and most traditional software development methodology that divides the software development process into distinct sequential ways, and each phase must be completed before moving to the next one. The sequential phases of the Waterfall Model:
The waterfall model in software engineering follows a sequential and linear chronology to develop software.
As shown in the waterfall model figure, every phase must be completed before moving to the next one.
And software engineers cannot go back to the previous phase.
For example, a software engineer finishes developing the “implementation phase,” but now developers want to go to the previous phase (system design) for some changes.
In such a case, a developer cannot return to the previous phase. In the waterfall model, once what is done, it’s unchangeable.
Waterfall Model Illustrate Following Phase To Develop A Software:
Indeed, the waterfall model is the most straightforward, simplest, and independent SDLC model.
The waterfall in software engineering diagram suggests six independent stages. Each phase must be completed before moving to the next one, and cannot return to the previous one.
Not every software project is suitable for the waterfall model. Therefore, before starting a software project, a software developer should analyze whether the project requirement matches with the water lifecycle principles.
Certainly, every SDLC model has some major advantages and disadvantages. And to develop a successful software, you have to watch out for the pros and cons of the selected software development model.
One of the major strengths of the classical waterfall model in software engineering is that every phase is an individual phase and maintains a strong control to ensure every aspect is working properly.
And one of the major weaknesses of the traditional waterfall model is that this model never has the ability to accept any change.
Waterfall Development Model
Agile Model In Software Development
3 Major Principle Of Waterfall Development Model
As mentioned above, there are several software engineering models, and each model follows a different principle to develop the software project. Below, I am mentioning three different and major principles of the waterfall model.
Even though the Waterfall Model in software engineering isn't that preferable in this modern age of software development life cycle.
However, the Waterfall Model can still be suitable for certain projects with stable and well-understood requirements, especially in industries with stringent compliance requirements.
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