Waterfall Model: Definition and Description

SDLC Assignment.
P1 and P2
Table of Contents
Waterfall Model:.........................................................................................................................................1
Definition:................................................................................................................................................1
How does it work:....................................................................................................................................1
Advantages of Waterfall Model:..............................................................................................................2
Disadvantages of Waterfall Model:.........................................................................................................2
Prototyping models:....................................................................................................................................2
Definition:................................................................................................................................................2
Types of prototyping models...................................................................................................................2
Bibliography................................................................................................................................................3
Bibliography................................................................................................................................................4
Advantages of using prototyping models................................................................................................4
Disadvantages of using prototyping models............................................................................................4
Spiral Model:...............................................................................................................................................5
Waterfall Model:
Definition:
A waterfall model is one the basic and simple Software Development Lifecycle model. Back in the early
days this model was widely used, but nowadays it is not. Despite not being used much in these days it is
still very important because all other SDLC models are based on it. (htt).
How does it work:
As the name suggests, waterfall, in analogy to a waterfall the steps taken first, or the procedures
followed, cannot be reversed, and each step/phase must be completed before the next one is initiated.

SDLC Assignment.
P1 and P2
Advantages of Waterfall Model:
 Easy to use
 Step by step completion of each phase
 The stages are well defined
 The tasks are easily manageable
Disadvantages of Waterfall Model:
 Once the application reaches the state of development, if any errors in the previous steps, you
cannot re do the mistakes.
 A functional software is produced after a long amount of time during the cycle
 There is a relatively huge risk of errors and inconstancy
 It is not suitable for in the long run
 Not applicable for projects where there is a min to max risk of changing requirements
Prototyping models:
Definition:
By the word prototyping we are referring to the act of creating prototypes of a certain application
beforehand to acknowledge any errors or bugs in the app to be created, so it can be fixed before
stepping into development phase. This would also lessen the iterations that may occur while using the
waterfall model.
Types of prototyping models
Throwaway prototyping:
In such case the prototypes are abandoned instead of becoming a part of the software.

SDLC Assignment.
P1 and P2
Bibliography
(n.d.). Retrieved from https://www.geeksforgeeks.org/software-engineering-classical-waterfall-model/
(n.d.). Retrieved from https://melsatar.blog/2012/03/15/software-development-life-cycle-models-and-
methodologies/
Evolutionary prototyping:
These are progressed into the final software through a repetitive user feedback.