Waterfall Model in Hindi #4 || Software Engineering || IGNOU MCS-034

Waterfall Model:
1. The Waterfall model is the earliest SDLC approach that was used for software development.
2. Waterfall model is an example of a Sequential model. So it is also referred to as a linear-sequential life cycle model.
3. It is very simple to understand and use. In a waterfall model, each phase must be completed before the next phase can begin.
4. Also called as classic life cycle model.
When Should You Use It?
Ans:
1. Requirements are clear and fixed that may not change.
2. There are no ambiguous requirements.(no confusion)
3. It is good to use this model when the technology is well understood.
4. The project is short and cost is low.
5. Risk is zero or minimum.
Advantages:
1. Simple and easy to understand and use.
2. Easy to manage.
3. Works well for smaller and low budget projects where
requirements are very well understood.
4. Clearly defined stages and Well understood.
5. Easy to arrange tasks.
6. Process and results are well documented.
Disadvantages:
1. No working software is produced until late during the life
cycle.
2. High amounts of risk and uncertainty.
3. Not a good model for complex and object-oriented projects.
4. Poor model for long and ongoing projects.
5. It is difficult to measure progress within stages.
6. Cannot accommodate changing requirements.
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