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Waterfall lifecycle model

Waterfall model is the most well known software lifecycle development model. It is very simple to understand and use. Each
next phase in this model must beginning only after the previous phase is over.
Waterfall software development model may be applicable to projects where:
  • Software requirements clearly defined and known
  • Software development technologies and tools is well known
  • New version of the existing software system is created

    waterfall-model

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    Advantages
    Disadvantages
    • Simple and easy to use.
    • Easy to manage due to the rigidity of the model – each phase has specific deliverables and a review process.
    • Phases are processed and completed one at a time.
    • Works well for smaller projects where requirements are very well understood.
    • Adjusting scope during the life cycle can kill a project
    • No working software is produced until late during the life cycle.
    • High amounts of risk and uncertainty.
     
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    		Software LifeCycle Selector Screensohot
     

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