This document discusses the waterfall model of software development. It provides: 1) A brief history of the waterfall model, noting it was the first SDLC model described in 1970 by Winston Royce. 2) An overview of the waterfall model, including that it is the oldest and most basic sequential model with distinct phases from requirements to maintenance. 3) A description of the five phases of the waterfall model: requirements gathering, design, implementation, testing, and maintenance. Each phase feeds into the next and must be completed before starting the next.

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software
GROUP MEMBRERS
Maria Saleem(91)
Anisa Zia(07)
Superior university
dipalpur
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SOFTWARE
Water fall
Model
HISTORY
• The first model description in 1970 by Winston
• W.ROYCE.
 Presented as an example of non working model
 It has been widely used for software projects.
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SOFTWARE
WATER FALL MODEL
• features
• First SDLC model
• Oldest model
• Linear sequential model
• Simple to understand
• easy to implement
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5. • Phases of water fall model
Waterfall model has 5 different phases,
Which are following.
1)Requirement gathering and Analysis.
2)Design.
3)Coding.
4)Testing.
5)Maintenance.
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Waterfallmodelphases
Water fall model
Requirement
gathering
System
design
• Design
documents
imliimenntation
• Developed
software
Testing
Deployment
phase
Quality assure
Requirement specification
maintena
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REQUIREMENTPHASE
1) Requirement gathering and
analysis
• Meeting with customer
• Software definition must be detailed
• And no ambiguities.
• Important to understand the
• Customer requirements and
• Expectations so that end product
• So that end product meets his
• Specification.
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Usercommunication
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9. Design
• The customer requirements are
broken down into logical modules
for the ease of implementation.
Hardware and software
requirements for every module are
Identified and designed accordingly.
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11. Coding is a step in which design is translated
into machine-readable form.
coding
Develop design into code.
Implementations of working application according
to the requirements of the user
 Developed software
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13. Testing is the process of executing a
program for finding an error
Verification and validation of software
testing
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15. This is the final phase of the waterfall model, in which
the completed software product is handed over to the client
after alpha, beta testing.
After the software has been deployed on the client site, it
is the duty of the software development team to undertake
routine maintenance activities by visiting the client site.
If the customer suggests changes or enhancements the
software process has to be followed all over again right
from the first phase i.e requirement analysis.
MAINTENANCE
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17. The water fall model is easy to
implementation.
For implementation of small systems water
fall model is use full.
The project requires the fulfillment of one
phase, before proceeding to the next.
It is easier to develop various software
through this method in short span of time.
ADVANTAGES OF WATER FALL MODEL
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18. The requirement analysis is done initially and sometimes it is
not possible to state all the requirement explicitly in the
beginning.
The customer can see working model of the project only at the
end.
If we want to go backtrack then it is not possible in this model.
It is difficult to follow the sequential flow in software
development process.
DISADVANTAGES OF WATER FALL MODEL
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20. THANK YOU
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