SDLC: WaterFall Model

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 name “WaterFall Model” is because the process looks like flowing steadily downwards - as shown below just like a waterfall .
WaterFall Model diagram
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.
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    Written with ❤️ & passion 🔥 by Rishabh Raghwendra

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    BeginnersWaterfallSdlcDevops

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    SDLC: WaterFall Model