The document discusses several common system analysis methodologies:
- Waterfall model is linear and sequential, best for well-defined requirements that don't change.
- V-model is similar to waterfall but adds testing phases to each development phase.
- Prototyping allows users to evaluate early versions before full development.
- Spiral model is iterative with risk analysis and prototypes, suitable for uncertain or changing requirements.
- Agile methods embrace changing needs and focus on frequent delivery of working software through collaboration.
Short descriptions of SDLC and Process Model: Waterfall
introduction,
places of applicability,
merits,
demerits,
comparison with others,
Effective and Ineffective project choices.
Short descriptions of SDLC and Process Model: Waterfall
introduction,
places of applicability,
merits,
demerits,
comparison with others,
Effective and Ineffective project choices.
Spiral Model - Software Development Life Cycle (SDLC)ACM-KU
This presentation is about Spiral Model in Software Development models. It includes all of it a bit of it's antiquity, its phases and all the important features.
The life cycle model is one of the key concepts of systems engineering (SE). A life cycle for a system generally consists of a series of stages regulated by a set of management decisions which confirm that the system is mature enough to leave one stage and enter another.
Obstacle Driven Development is the latest engineering process and combines Test Driven Development with safety critical V-model development.
This updated presentation demonstrates how ODD extends and combines V-model development into an M-model.
Please see the series for further details.
SDLC Models and their implementations. Almong with the flow of each model. The PPT contains implementations of each model for various software development phases
Spiral Model - Software Development Life Cycle (SDLC)ACM-KU
This presentation is about Spiral Model in Software Development models. It includes all of it a bit of it's antiquity, its phases and all the important features.
The life cycle model is one of the key concepts of systems engineering (SE). A life cycle for a system generally consists of a series of stages regulated by a set of management decisions which confirm that the system is mature enough to leave one stage and enter another.
Obstacle Driven Development is the latest engineering process and combines Test Driven Development with safety critical V-model development.
This updated presentation demonstrates how ODD extends and combines V-model development into an M-model.
Please see the series for further details.
SDLC Models and their implementations. Almong with the flow of each model. The PPT contains implementations of each model for various software development phases
Agile methodology is a flexible and iterative strategy that allows teams to quickly adjust to changing project needs and deliver high-quality solutions in less time. In software development, agile is frequently utilized.
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.
The presentation is guide for the New Project managers and Scrum Masters .It has been prepared considering the basics of Projects and Project Management upto the fine detailing of the Scrum Agile Framework.
Ofcourse the contents are the guiding material and not exhaustive in nature.The contents shall help the Scrum Masters & Project Managers to have deep understanding for the Scrum Framework and adopt in day to day practise in order to successfully deliver the project within the given constrains
Introduction to Software Engineering and Software Process Modelssantoshkawade5
S/W Engineering
Software Engineering Fundamentals: Introduction to software engineering, The Nature of Software, Defining Software, Software Engineering Practice.
A Generic Process Model, defining a Framework Activity, Identifying a Task Set, Process Patterns, Process Assessment and Improvement, Prescriptive Process Models, The Waterfall Model, Incremental Process Models, Evolutionary Process Models, Concurrent Models, A Final Word on Evolutionary Processes. Unified Process, Agile software development: Agile methods, plan driven and agile development.
Top Software Testing Models for Customer Satisfaction.pdfZoe Gilbert
Be it any industry, the prime focus for all of us is our customers only. Offering an inappropriate testing methodology for your client can affect the delivery of the project hence the relationship with the customer. This write-up will guide you about the various testing models and best fit for you.
Software Lifecycle Models / Software Development Models
Types of Software development models
Waterfall Model
Features of Waterfall Model
Phase of Waterfall Model
Prototype Model
Advantages of Prototype Model
Disadvantages of Prototype model
V Model
Advantages of V-model
Disadvantages of V-model
When to use the V-model
Incremental Model
ITERATIVE AND INCREMENTAL DEVELOPMENT
INCREMENTAL MODEL LIFE CYCLE
When to use the Incremental model
Rapid Application Development RAD Model
phases in the rapid application development (RAD) model
Advantages of the RAD model
Disadvantages of RAD model
When to use RAD model
Agile Model
Advantages of Agile model
Disadvantages of Agile model
When to use Agile model
1. This will help to understand the different types of SDLC models in Software Testing.
2. Advantages and Disadvantages of SDLC models.
3. Why these many models developed and what was the benefit over the existing ones?
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4. waterfall
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.
Product definition is stable.
Technology is understood and is not dynamic.
There are no ambiguous requirements.
Ample resources with required expertise are available to support the
product.
The project is short.
5. Waterfall Advantages
Simple and easy to understand and use
Easy to manage due to the rigidity of the model. Each phase has specific
deliverables and a review process.
Phases are processed and completed one at a time.
Works well for smaller projects where requirements are very well understood.
Clearly defined stages.
Well understood milestones.
Easy to arrange tasks.
Process and results are well documented.
6. Waterfall disadvantages
No working software is produced until late during the life cycle.
High amounts of risk and uncertainty.
Not a good model for complex and object-oriented projects.
Poor model for long and ongoing projects.
Not suitable for the projects where requirements are at a moderate to high risk
of changing. So, risk and uncertainty is high with this process model.
It is difficult to measure progress within stages.
Cannot accommodate changing requirements.
Adjusting scope during the life cycle can end a proj
8. V- Model application is almost the same as the waterfall model, as both the
models are of sequential type. Requirements have to be very clear before the
project starts, because it is usually expensive to go back and make changes.
This model is used in the medical development field, as it is strictly a
disciplined domain.
The following pointers are some of the most suitable scenarios to use the V-
Model application.
Requirements are well defined, clearly documented and fixed.
Product definition is stable.
Technology is not dynamic and is well understood by the project team.
There are no ambiguous or undefined requirements.
The project is short.
9. The advantages
This is a highly-disciplined model and Phases are completed one at
a time.
Works well for smaller projects where requirements are very well
understood.
Simple and easy to understand and use.
Easy to manage due to the rigidity of the model. Each phase has
specific deliverables and a review process.
11. Prototype is a working model of software with some limited
functionality. The prototype does not always hold the exact
logic used in the actual software application and is an extra
effort to be considered under effort estimation.
Prototyping is used to allow the users evaluate developer
proposals and try them out before implementation. It also
helps understand the requirements which are user specific
and may not have been considered by the developer during
product design.
Following is a stepwise approach explained to design a
software prototype.
12. The advantages
Increased user involvement in the product even before its
implementation.
Since a working model of the system is displayed, the users get a
better understanding of the system being developed.
Reduces time and cost as the defects can be detected much
earlier.
Quicker user feedback is available leading to better solutions.
Missing functionality can be identified easily.
Confusing or difficult functions can be identified.
13. The Disadvantages
Risk of insufficient requirement analysis owing to too much
dependency on the prototype.
Users may get confused in the prototypes and actual systems.
Practically, this methodology may increase the complexity of
the system as scope of the system may expand beyond original
plans.
Developers may try to reuse the existing prototypes to build the
actual system, even when it is not technically feasible.
The effort invested in building prototypes may be too much if it
is not monitored properly.
14. Spiral Model
the following pointers explain the typical uses of a
When there is a budget constraint and risk evaluation is important.
For medium to high-risk projects.
Long-term project commitment because of potential changes to economic
priorities as the requirements change with time.
Customer is not sure of their requirements which is usually the case.
Requirements are complex and need evaluation to get clarity.
New product line which should be released in phases to get enough customer
feedback.
Significant changes are expected in the product during the development cycle.
16. advantages
Changing requirements can be accommodated.
Allows extensive use of prototypes.
Requirements can be captured more accurately.
Users see the system early
17. Disadvantages
Management is more complex.
End of the project may not be known early.
Not suitable for small or low risk projects and could
be expensive for small projects.
Process is complex
Large number of intermediate stages requires
excessive documentation
19. Basic principles of alige method
Satisfy the client and continually develop software.
Changing requirements are embraced for the client’s competitive
advantage.
Concentrate on delivering working software frequently. Delivery
preference will be placed on the shortest possible time span.
Developers and business people must work together throughout the
entire project.
Projects must be based on people who are motivated. Give them the
proper environment and the support that they need. They should be
trusted to get their jobs done.
Face-to-face communication is the best way to transfer information to
and from a team.
Working software is the primary measurement of progress.
Agile processes will promote development that is sustainable. Sponsors,
developers, and users should be able to maintain an indefinite, constant
pace
20. Advantages of Agile
Agile can meet changing requirements. Since stages aren’t
isolated, you can accommodate customer feedback without
running the entire software.
Agile allows for more software testing because test cases can be
executed at any time. In fact, testing is often done
simultaneously along development.
People that adopt Agile often believe it results in less bugs and
higher quality software. When bugs are found, they’re much
easier to fix.
Agile is supports a faster development method for more features
to be released more quickly.
Agile accommodates faster feedback, cross-departmental
communication, and collaboration.
Testing and development interact more throughout the process
to create a high-quality project.