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Topic:- At the end we will be able to explain:- Why it is called Meta Model ?? Spiral Model Its Advantages & Disadvantages… Phases of Spiral Model...

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Presentation on theme: "Topic:- At the end we will be able to explain:- Why it is called Meta Model ?? Spiral Model Its Advantages & Disadvantages… Phases of Spiral Model..."— Presentation transcript:

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2 Topic:-

3 At the end we will be able to explain:- Why it is called Meta Model ?? Spiral Model Its Advantages & Disadvantages… Phases of Spiral Model... When we use it ??

4  The spiral model, also known as the spiral lifecycle model, is a systems development lifecycle (SDLC) model used in information technology (IT). This model of development combines the features of the prototyping model and the waterfall model.SDLCwaterfall model  IT WAS FIRST PROPOSED BY barry BOEHM in 1986.  In Spiral model we can arrange all the activities in the form of a spiral.

5  This model is best used for large projects which involves continuous enhancements.  In Spiral model we can arrange all the activities in the form of a spiral.  This model is best used for large projects which involves continuous enhancements.  In Spiral model we can arrange all the activities in the form of a spiral.

6 Spiral model is also called as meta-model because in a way it comprises of other models of SDLC. Both waterfall and prototype models are used in it. We are able to reduce risks as well as follow systematic approach.

7 Prototype The prototyping model is a systems development method (SDM) in which a prototype is built, tested, and then reworked as necessary until an acceptable prototype is finally achieved. 7

8 Phase in spiral model PLANRisk Analysis Engineering Customer evaluation

9 To explain in simpler terms, the steps involved in spiral model are:

10 Planning phase Risk analysis phase Engineering phase Evaluation phase

11  Requirements are studied and gathered  Reviews and walkthroughs to streamline the requirements  Requirements understanding document  Finalized list of requirements  Requirements are studied and gathered  Reviews and walkthroughs to streamline the requirements  Requirements understanding document  Finalized list of requirements

12  All possible alternatives, which can help in developing a cost effective project are analyzed.  This phase identify and resolve all the possible risks in the project development.  All possible alternatives, which can help in developing a cost effective project are analyzed.  This phase identify and resolve all the possible risks in the project development.

13  Actual development and testing if the software takes place in this phase  Code  Test cases and test results  Test summary report and defect report  Actual development and testing if the software takes place in this phase  Code  Test cases and test results  Test summary report and defect report

14  Customers evaluate the software and provide their feedback and approval  Features implemented document  Includes evaluation of software by the customer and implementing feedback in the next iteration of the software development  Customers evaluate the software and provide their feedback and approval  Features implemented document  Includes evaluation of software by the customer and implementing feedback in the next iteration of the software development

15  Development is fast.  Larger projects / software are created and handled in a good planning way.  More and more features are added in a systematic way.  Software is produced early.  Customer can full fill their requirement as their own will.  Development is fast.  Larger projects / software are created and handled in a good planning way.  More and more features are added in a systematic way.  Software is produced early.  Customer can full fill their requirement as their own will.

16  Risk analysis is important phase so requires expert people.  Is not beneficial for smaller projects.  Spiral may go infinitely.  It is costly for smaller projects.  Risk analysis is important phase so requires expert people.  Is not beneficial for smaller projects.  Spiral may go infinitely.  It is costly for smaller projects.

17  When the project is large.  For medium to high-risk projects.  Users are unsure of their needs.  Significant changes are expected.  Requirements are complex.  When the project is large.  For medium to high-risk projects.  Users are unsure of their needs.  Significant changes are expected.  Requirements are complex.

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