Learn how and what is Spiral Model. This was made during 3RD Year. From Eastern Visayas State University - Main Campus, Tacloban City, Leyte, Philippines
CREATED BY:
Aguilar, Fatima Joy
Arpon, Benedict Julius Steven
Spiral Model is one of the classical SDLCs practiced around the world. Heavily advantageous for projects in catering for needs in the long run bound to change through out the time, Spiral model has been one of those theoretically taught for different course modules in IT and Computer Science.
Spiral Model is one of the classical SDLCs practiced around the world. Heavily advantageous for projects in catering for needs in the long run bound to change through out the time, Spiral model has been one of those theoretically taught for different course modules in IT and Computer Science.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
A Water Fall Model is easy to flow.
It can be implemented for any size of project.
Every stage has to be done separately at the right time so you cannot jump stages.
Documentation is produced at every stage of a waterfall model allowing people to understand what has been done.
Testing is done at every stage.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This approach carries less risk than a traditional Waterfall approach but is still far more risky and less efficient than a more Agile approaches.
In Iterative model, iterative process starts with a simple implementation of a small set of the software requirements and iteratively enhances the evolving versions until the complete system is implemented and ready to be deployed.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
The first formal description of the waterfall model is often cited as a 1970 article by Winston W. Royce
Royce did not use the term "waterfall" in this article.
Royce presented this model as an example of a flawed, non-working model.
These PPT presentation help to understand waterfall model in SDLC. The Waterfall model is the earliest SDLC approach that was used for software development. There are five steps in the waterfall model.
Waterfall Model PPT in Software EngineeringRaju Sheoran
What is Waterfall Model? History of waterfall model, Advantages, Disadvantages and much more realted to waterfall model.
The waterfall model is the basic and simple software development life cycle model. But idealistic. Earlier the waterfall model was very popular but these days it is not used while software development. And the model was divided into phases and all the phases are organized in linear order. This model was first introduced by Dr. Winston in 1970.
This model is very popular and very important because all the models in software development life cycle models are based on it. So, we can call it, It is the base of all software development life cycle models or it is known as Classical Waterfall Model.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
A Water Fall Model is easy to flow.
It can be implemented for any size of project.
Every stage has to be done separately at the right time so you cannot jump stages.
Documentation is produced at every stage of a waterfall model allowing people to understand what has been done.
Testing is done at every stage.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This approach carries less risk than a traditional Waterfall approach but is still far more risky and less efficient than a more Agile approaches.
In Iterative model, iterative process starts with a simple implementation of a small set of the software requirements and iteratively enhances the evolving versions until the complete system is implemented and ready to be deployed.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
The first formal description of the waterfall model is often cited as a 1970 article by Winston W. Royce
Royce did not use the term "waterfall" in this article.
Royce presented this model as an example of a flawed, non-working model.
These PPT presentation help to understand waterfall model in SDLC. The Waterfall model is the earliest SDLC approach that was used for software development. There are five steps in the waterfall model.
Waterfall Model PPT in Software EngineeringRaju Sheoran
What is Waterfall Model? History of waterfall model, Advantages, Disadvantages and much more realted to waterfall model.
The waterfall model is the basic and simple software development life cycle model. But idealistic. Earlier the waterfall model was very popular but these days it is not used while software development. And the model was divided into phases and all the phases are organized in linear order. This model was first introduced by Dr. Winston in 1970.
This model is very popular and very important because all the models in software development life cycle models are based on it. So, we can call it, It is the base of all software development life cycle models or it is known as Classical Waterfall Model.
https://www.learntek.org/blog/spiral-model/
https://www.learntek.org/
Learntek is global online training provider on Big Data Analytics, Hadoop, Machine Learning, Deep Learning, IOT, AI, Cloud Technology, DEVOPS, Digital Marketing and other IT and Management courses.
https://www.learntek.org/blog/spiral-model/
https://www.learntek.org/
Learntek is global online training provider on Big Data Analytics, Hadoop, Machine Learning, Deep Learning, IOT, AI, Cloud Technology, DEVOPS, Digital Marketing and other IT and Management courses.
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2. SPIRAL MODEL
Spiral Model is an evolutionary software process model
which is combination of an iterative nature of prototyping
and systematic aspects of traditional waterfall model
Spiral model can be adapt to apply
throughout the life of computer
software.
In spiral model, we can easily adjust
easily software development with
the required changes.
3.
4. BARRY BOEHM
born on 1935.
In America Software
Engineer,
Distinguished Professor
At the University of
Southern California.
5. When to use Spiral Model
When costs and risk evaluation is important
For medium to high-risk projects
Users are unsure of their needs
Requirements are complex
Significant changes are expected
6. Four fold procedure
1. Evaluating the first prototype in terms of its
strengths, weaknesses, risk.
2. Defining the requirements of the second prototype
3. Planning and designing the second prototype.
4. Constructing and testing the second prototype
EVALUATING
NGCONSTRUCTING
/ TESTING
PLANNING /
DESIGNING
DEFINING
8. The Spiral has Four Phases:
PLANNING
Requirements are gathered
during the planning phase.
RISK
ANALYSIS
a process is undertaken to
identify risk and alternate
solutions.
EVALUATION
This phase allows the
customer to evaluate the
output of the project
ENGINEERING
In this phase software
is developed, along
with testing at the end of
the phase.
9. Advantages of Spiral Model
High amount of risk analysis hence, avoidance of Risk is
enhanced.
Good for large and mission – critical projects.
Strong approval and documentation control.
Additional Functionality can be added at later date.
Software is produced early in the software life cycle.
10. Disadvantages of Spiral Model
Can be a costly model to use.
Risk analysis requires highly specific expertise.
Projects success is highly dependent on the risk
analysis phase.
Doesn’t work well for smaller projects.
11. WATERFALL VS. SPIRAL MODEL
The sequential nature of the waterfall
model if a bug is found or an error is
incurred for a preliminary reason, we
need to start from the scratch again
Waterfall model the stages are executed
under a sequential flow. Every new phase
is processed only after completing the
previous phase.
Whereas, under spiral model every prototype
is tried and tested and hence the chances of
find errors at later stages are very rare.
In spiral model, we can easily adjust software
development with the required changes.
12. AGILE VS. SPIRAL MODEL
Agile development includes a number of
different methodologies w/ specific
guidance as to the steps to take to
produce a software project such as
Extreme programming. Scrum and Crystal
Clear.
In spiral model, we can easily adjust software
development with the required changes.
13. INCREMENTAL VS. SPIRAL
MODEL
Incremental Development is a practice
where the system functionalities are
sliced into increments(small portions).
A software project repeatedly passes through
these phases in iteration( called spiral in this
model). The baseline spiral, staring in the
planning phase, requirements are gathered
and risk is assessed.
14. PROTOTYPE VS. SPIRAL MODEL
Prototype model is suitable when the
requirement of the client is not clear and it
is supposed to be changed.
Spiral model is called a meta model. Spiral
model is made with the features of Prototype
model and Waterfall model. Spiral model
takes special care about Risk analysis.
15. CONCLUSION
Each Spiral can be termed as a loop and each loop is a
separate development process in a Spiral Model.
The Four activities ( Planning, Risk analysis, Engineering
and Evaluating) form the intermediary phases of Spiral
model and is repeated again for each loop.
This model is very good to use for larger projects where you
can develop and deliver smaller prototypes and can
enhance it to make the larger software.
