The Waterfall Model was the first Process Model to be introduced. It was widely used as it was easy to understand & implement .
WaterFall Model is also known as Linear-Sequential Life Cycle Model because work is done linearly - the next stage begins after completion of the previous stage . Output of the previous stage is the input of the next stage .
The Phases are:-
Requirement Analysis: In this phase all the requirements about the project are gathered . For eg features in projects , etc . All these requirements are well documented in the SRS ( Software Requirement Specifications ) document.
System Design: The SRS document is then used to design the system . Defining system requirements like hardware, modules (any),etc.
Implementation: After the System design phase is completely over . Implementation phase starts . Here each unit is individually developed . This stage goes on until all the requirements in the SRS document are not developed .
Testing & Integration: Each individual unit is tested for potential bugs or errors . After testing is successful , individual units are integrated together.
Deployment: Once the integration is done, the software is deployed to production servers.
Note: Before deploying to production , the project is tested again (we are not going into much details).
- Maintenance: Project is continuously being monitored for any user inconvenience or bugs . Time to time new patches are released as a result of any bug fixes.
Projects best fit for WaterFall Model:
- Requirements are clear
- Technology used is not dynamic
- Project is short
Advantages of WaterFall Model:
- Model is simple & easy to understand
- Clear defined milestones & deadlines
- Properly documented , hence team is focused towards one common goal
- Clearly defined stages
- Easy to arrange tasks
Disadvantages of WaterFall Model:
- No working software is made till end of life cycle
- Client feedback is not taken at any stage.
- Not good fit for changing project requirements
- Not suitable for OOPs & long-on going projects
- Difficult to track progress within a stage
- Includes high amount of risk & uncertainty
So far, we have discussed the WaterFall model, it’s use cases, advantages & disadvantages.
Feel free to comment if you have any questions. All comments are greatly appreciated. If you like the blog , don’t forget to like it & share with your friends/colleagues.
Thanks for reading,
Written with ❤️ & passion 🔥 by Rishabh Raghwendra