Waterfall model is simplest model of software development paradigm - Process Modelling and SDLC

Q.  What is the simplest model of software development paradigm?
- Published on 21 Jul 15

a. Spiral model
b. Big Bang model
c. V-model
d. Waterfall model

ANSWER: Waterfall model


  • Nirja Shah   -Posted on 09 Oct 15
    Waterfall Model
    - This was the first SDLC Model to be used widely in Software Engineering to ensure success of the project.

    - The whole process of software development is divided into separate phases.

    - The outcome of one phase acts as the input for the next phase sequentially.

    - The sequential phases in Waterfall model are:

    Requirement Gathering and analysis
    - All possible requirements of the system to be developed are captured in this phase and documented in a requirement specification doc.

    System Design
    - The requirement specifications from first phase are studied in this phase and a system design is prepared.
    - It helps in specifying hardware and system requirements and also helps in defining overall system architecture.

    - With inputs from system design, the system is first developed in small programs called units, which are integrated in the next phase.
    - Each unit is developed and tested for its functionality which is referred to as Unit Testing.

    Integration and Testing
    - All the units developed in the implementation phase are integrated into a system after testing of each unit.
    - Post integration the entire system is tested for any faults and failures.

    Deployment of system
    - Once the functional and non functional testing is done, the product is deployed in the customer environment or released into the market.

    - Sometimes issues may come up in the client environment.
    - To fix those issues patches are released. Also to enhance the product some better versions are released.
    - Maintenance is done to deliver these changes in the customer environment.

    - All these phases are cascaded to each other in which progress is seen as flowing steadily downwards (like a waterfall) through the phases.

    - The next phase is started only after the defined set of goals are achieved for previous phase and it is signed off, so the name "Waterfall Model".

    - In this model phases do not overlap.

Post your comment / Share knowledge

Enter the code shown above:
(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)