what is waterfall model , what is its advantages & disadvantages , what is process life cycle what are its steps

1. PROCESS LIFE CYCLE,
PLANNING AND
MANAGING THE PROJECT
{ M A D E B Y }
A B H I S E K T E W A R I
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CONTENTS
Introduction
Stages of Waterfall Model
Advantages of Waterfall Model
Disadvantages of Waterfall Model
Applications of Waterfall Model

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 What is Process Life Cycle?
The process life cycle can be defined by a state
diagram. Which has states representing the execution
status of process at various time and transitions. That
shows the changes in the execution status.
4 phases of the project management life cycle ,
The project management life cycle is usually broken
down into four phases: initiation, planning, execution,
and closure. These phases make up the path that takes
your project from the beginning to the end .
# Some methodologies also include a fifth phase
which is —controlling or monitoring—but for our
purposes, this phase is covered under the execution
and closure phases.

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THE WATERFALL METHODOLOGY IS COMPOSED OF SEVEN NON-OVERLAPPING STAGES:
Requirements: Potential requirements, deadlines and guidelines for the project are analyzed and
placed into a functional specification. This stage handles the defining and planning of the project without
mentioning specific processes.
Analysis: The system specifications are analyzed to generate product models and business logic that
will guide production. This is also when financial and technical resources are audited for feasibility.
Design: A design specification document is created to outline technical design requirements such as
programming language, hardware, data sources, architecture and services.
Coding/Implementation: The source code is developed using the models, logic and requirements
designated in the prior stages. Typically, the system is designed in smaller components, or units, before
being implemented together.
Testing: This is when quality assurance, unit, system and beta tests take place to report issues that may
need to be resolved. This may cause a forced repeat of the coding stage for debugging. If the system passes
the tests, the waterfall continues forward.
Operation/Deployment: The product or application is deemed fully functional and is deployed to a
live environment.
Maintenance: Corrective, adaptive and perfective maintenance is carried out indefinitely to improve,
update and enhance the final product. This could include releasing patch updates or releasing new
versions.

5. ADVANTAGES
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While agile or dynamic methods often replace the waterfall
model, there are some advantages:
structured , disciplined organization.
simple to understand, follow and arrange tasks.
Facilitates departmentalization and managerial control
based on schedule or deadlines.
good coding habits to define before design and then code.
Allows for early design or specification changes to be made
easily.
Clearly defines milestones and deadlines.

6. DISADVANTAGES
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The disadvantages of the waterfall model
typically surround risk associated with a lack
of revision, including:
• Design is not adaptive; often when a flaw
is found, the entire process needs to start
again over.
• Delays testing until the end of the
development life cycle.
• Does not consider error correction.
• No working product is available until the
later stages of the life cycle.
• Not ideal for complex, high risk, ongoing
or object-oriented projects.

7. Every software developed is different and requires a
suitable SDLC approach to be followed based on the
internal and external factors. Some situations where the
use of Waterfall model is most appropriate are
• Requirements are very well documented, clear and
fixed.
• There are no ambiguous requirements .
• Ample resources with required expertise are available to
support the product .
• The project is short.
Waterfall Model – Application
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8. #--THANK YOU--#
REFERENCE – GOOGLE {WIKI}
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