Software Dev Life Cycle

8/8/2019 Software Dev Life Cycle

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BIKRAM KESHARI GIRI [1]NATIONALINSTITU

TEOFSCIENC

E&TECHNOLOGY

SOFTWARE DEVELOPMENT LIFE CYCLE

SOFTWAREDEVELOPMENT LIFE

CYCLE

Under the Guidance of

Mr. R. K. Shial

Bikram Keshari Giri

Roll no: CS200117247

TECHNICAL SEMINAR


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INTRODUCTION: The objective of SDLC is to introduce

various design tools and concepts. Butthis is the Small part of SDLC contains thefive phases and five models.

Process Models combines the software

development life cycle with various tools toimplement the different phases to projects.


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The Five Phases of SDLC


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PROCESS MODELS:The five generic phases of SDLC are combined with different

software tools and methodologies to create SDLCstrategies that can be applied to real life scenarios. Thesestrategies are called Process Models or the softwareengineering paradigms .

Some of the process models are: The Waterfall model The Prototyping model The Evolutionary model The RAD (Rapid Application Development) model The Spiral model


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THE WATERFALL MODEL


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THE PROTOTYPING MODEL:The prototype is a working model that can

be used for several purpose such as: Validating the users requirements. Performing a feasibility study of a complex

system. Arriving at the functional specifications of

a system. Establishing a starting point for further

evolution.


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RAPID PROTOTYPING


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COMBINING SDLC MODELS


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THE EVOLUTIONARY MODEL:In the early approach to prototyping, the first version

or the prototype was thrown away and replaced bythe production version. The new approach is theevolutionary prototyping approach hence, the

name Evolutionary model.The Evolutionary model has been defined as: Deliver something to the user. Measure the added value to the user in all critical

dimensions. Adjust both the design and the objectives basedon observed realities.


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THE RAD MODEL:The Rapid application Development (RAD) model is a

linear process model that leads to fast developmentof applications. It uses component-based systemsuch as object-oriented systems. Components are re-used whenever possible.

The RAD model has the following five phases: Business modeling Data modeling Process modeling Application generation Testing and turnover


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RAD MODEL


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THE SPIRAL MODEL:This model aims at incorporating the strengths and avoiding

the difficulties faced during the implementation of other models by shifting the management emphasis to riskevaluation and resolutions.

Setting objectives: Involves specifying the product andprocess objectives in terms of there functionality andperformance.

Analyzing Risk: Involves identifying the risks that may bephased during project development.

Engineering: Involves the actual construction of thesystem.

Evaluating the product: Involves the customer evaluatingthe product for errors and need for modifications.


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THE SPIRAL MODEL


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CONCLUSION

Finally, The objective of SDLC is to introduces variousdesign tools and concepts.

But this is the Small part of SDLC contains the differentphases and models .

And Process Models combines the

software development life cycle with various toolsto implement the different phases to projects.


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THANK YOU !!!

Documents

Software Dev Life Cycle