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Software Development Process

By: KUMAR NISHANT

(090101096)

KUNAL JINDAL

(090101097)

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What is Software development

process

A software development process, also known as a

software development life cycle (SDLC), is a structureimposed on the development of a software product.

There are several models for such processes, eachdescribing approaches to a variety of tasks or activities that

take place during the process.

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Several models exist to streamline the development

process. Each one has its pros and cons, and it's up tothe development team to adopt the most appropriateone for the project. Sometimes a combination of themodels may be more suitable.

Software development models

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The waterfall model shows a process, where developers areto follow these phases in order:

1.Requirements specification

2.System design

3.Implementation and Integration

4.Testing (or Validation)5.Deployment (or Installation)

6.Maintenance

Waterfall model

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Oldest and most widely used

Systematic and sequentialapproach.

Requirements are well understood

Explicit recognition of phases.

Errors can be identified at earlystages

Advantages of waterfall model

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Complete set of user requirement

Time consuming

Doesnt incorporate risk assessment

Real projects rarely follow sequential flow

Not for new software projects

Disadvantages of waterfall

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What is Wicked ProblemProblems we cant really understand untilweve developed a solution.

That is not what I want ... but now I knowwhat I dowant!

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Put together a team of SmartGuys from multiple disciplines

Develop the GUI on Paper

Code the GUI in a fast language(Make it look likeits working)

Show it to the USERS

Get Feedback

Prototyping Model

Listen ToCustomer

Build/ReviseMockup

Customer TestDrives Mockup

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Problems With Prototyping

No Current Documents.

Prototype is not baseline

functionality

Startup costs for building aprototype may be high

Developing team may compromiseduring prototype implementation

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Advantage

Faster development

Improved communication b/w user &

team

Easy requirement analysis

User involvement during development

More errors can be identified at eachprototype

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The iterative model is also called increment model

because we increment the requirement in each cycle. This model has the same phases as the waterfall

model , but with fewer restrictions.

Iterative model

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Spiral model

Combining elements of both designand prototyping-in-stages.

An effort to combine advantagesof top-down and bottom-up concepts.

The features of the prototypingmodel and the waterfall model.

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Prototype 1

Prototype 2 Prototype 3

Operational

Prototype

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Spiral ModelStrength and Weaknesses

o Strengths Introduces risk management

Prototyping controls costs

Evolutionary development flexible design

Release builds for beta testing No need to define all requirements in detail at early stage

o Weaknesses

Lack of risk management experience

Doesn't work well for smaller projects

Can be a costly & complex model to use

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THANK YOU