Iterative Waterfall Model with example in Hindi
Summary
TLDRThe iterative waterfall model, a modification of the classical waterfall model, introduces feedback mechanisms to address issues that arise during later stages, preventing them from propagating further. Unlike the classical model, which lacks feedback, the iterative version allows for changes based on detected problems in testing or design phases. However, feedback is not present in the feasibility study phase. The model retains the simplicity and ease of the base model, making it suitable for small projects. Despite the addition of feedback, it still suffers from the same disadvantages as the classical model, including no phase overlapping, no intermediate delivery, rigidity in requirements, and less customer interaction.
Takeaways
- 🔄 **Iterative Waterfall Model**: A modified version of the classical waterfall model that includes feedback mechanisms.
- 🔁 **Feedback Mechanism**: Allows for the detection and correction of issues in later stages by communicating back to earlier stages, unlike the classical model.
- ⛔ **No Feedback in Feasibility**: Once a commitment is made in the feasibility study, there's no turning back, emphasizing the importance of initial decision-making.
- 📉 **Advantages Retained**: The iterative model retains the simplicity and ease of the classical model, making it suitable for small projects.
- 🔒 **Rigidity in Requirements**: Despite feedback, the model maintains a rigid structure where requirements, once set, are not easily changed.
- 🚫 **No Phase Overlapping**: Each phase must be completed before the next begins, preventing parallel development.
- 🚚 **No Intermediate Delivery**: The product is delivered in its entirety upon completion, with no partial or prototype deliveries in between.
- 🤝 **Limited Customer Interaction**: Customer interaction is minimal, with most engagement occurring at the beginning and end of the project.
- 🔍 **Focus on Detection and Correction**: The model emphasizes the importance of detecting and correcting errors as they arise, rather than waiting until the end of the project.
- 📋 **Documentation Importance**: The script implies the significance of proper documentation, such as the SRS document, in guiding the development process.
Q & A
What is the iterative waterfall model?
-The iterative waterfall model is a modified version of the classical waterfall model, which incorporates feedback mechanisms to address issues detected in later stages of the software development process.
How does feedback work in the iterative waterfall model?
-In the iterative waterfall model, feedback allows for the detection of problems in later stages, such as during testing, and the communication of these issues back to earlier stages, like design or coding, for necessary revisions.
What is the main difference between the classical waterfall model and the iterative waterfall model?
-The main difference is the inclusion of feedback in the iterative model, which was absent in the classical model, leading to the propagation of errors through stages without the possibility of correction.
Are there any stages in the iterative waterfall model where feedback is not applicable?
-Yes, feedback is not applicable in the feasibility study stage of the iterative waterfall model, as once a commitment is made to develop the software, it is expected to be followed through.
What are the advantages of the iterative waterfall model?
-The advantages include simplicity and ease of use, suitability for small projects, and the introduction of feedback to correct mistakes, which was a limitation in the classical model.
What are the disadvantages of the iterative waterfall model?
-The disadvantages include no phase overlapping, which means a linear progression without parallel work, no intermediate delivery of the product, rigidity in requirements that are not easily changed once set, and less customer interaction.
How does the iterative waterfall model handle requirements changes?
-The iterative waterfall model allows for feedback to correct issues but does not support frequent changes in requirements. Once requirements are fixed, they are expected to remain unchanged throughout the project.
Can you explain the concept of 'no phase overlapping' in the iterative waterfall model?
-No phase overlapping means that each phase of the software development process must be completed before the next phase can begin, preventing parallel work and the ability to work on multiple phases simultaneously.
What does 'no intermediate delivery' imply in the context of the iterative waterfall model?
-'No intermediate delivery' means that the software product is delivered to the customer only after the entire development process is completed, with no partial or prototype deliveries in between.
How does the iterative waterfall model affect customer interaction?
-Customer interaction is limited in the iterative waterfall model, as the customer's involvement is mostly at the beginning for requirement gathering and at the end for the final product delivery, with minimal interaction during the development stages.
Is the iterative waterfall model suitable for complex projects?
-The iterative waterfall model may not be suitable for complex projects due to its rigid structure and lack of flexibility in handling changes and customer feedback throughout the development process.
Outlines
🔄 Iterative Waterfall Model Overview
The paragraph introduces the iterative waterfall model as a modified version of the classical waterfall model. It emphasizes the addition of a feedback mechanism, which allows for the correction of mistakes or issues detected in later phases by informing earlier phase teams. This is a significant departure from the classical model, which lacks such feedback, leading to the propagation of errors. The paragraph also notes that feedback does not occur during the feasibility study phase, suggesting a commitment to the project's continuation once the decision to proceed is made. Advantages of the iterative model include its simplicity and suitability for small projects, while disadvantages mirror those of the classical model, such as the lack of phase overlapping, no intermediate delivery, rigidity in requirements, and limited customer interaction.
Mindmap
Keywords
💡Iterative Waterfall Model
💡Feedback
💡Classical Waterfall Model
💡Problem Propagation
💡Feasibility Study
💡Phase Overlapping
💡Parallelism
💡Intermediate Delivery
💡Rigidity
💡Customer Interaction
Highlights
Introduction to the Iterative Waterfall Model as a modified version of the classical waterfall model.
Emphasis on the introduction of feedback in the iterative model, which was absent in the classical model.
Explanation of how feedback allows for the correction of mistakes in earlier stages, preventing them from propagating to later stages.
Clarification that feedback is not present in the feasibility study phase, once a commitment is made, it is not revisited.
Advantages of the iterative model include simplicity and ease, making it suitable for small projects.
The additional concept of feedback in the iterative model as a key differentiator from the classical model.
Disadvantages such as no phase overlapping, which means phases are completed sequentially without parallelism.
Lack of intermediate delivery, where the software is delivered only after the entire project is completed.
Rigidity in requirements, where once requirements are set, they are not easily changed in later phases.
Limited customer interaction, with customers only seeing the product upon completion and delivery.
The iterative model's inability to provide partial or prototype deliveries for customer feedback before the final product.
The iterative model's retention of the classical model's disadvantages, such as rigidity and limited customer interaction.
The importance of remembering the main differences between the classical and iterative waterfall models for exams.
A quote from Salman Khan is used to illustrate the concept of commitment in the feasibility study phase.
The iterative model's feedback mechanism allows for changes based on detected issues in later stages.
The iterative model is recommended for its simplicity and suitability for small projects, with feedback as a key enhancement.
Transcripts
Dear students welcome to Gates Smashers
I'm going to explain what is iterative waterfall model
In last video we had talked about classical waterfall model
What are the advantages and disadvantages
So this iterative waterfall model
It is a modified version of classical
And in modification one of the major modifications that has done
That is the feedback
Because in classical feedback system was not there
That means if any mistake is done in one particular stage
If any problem comes
It will keep on propagating in further stages
But over here the major change that they have done
That in case if any problem occurs
And lets say I detected that problem encoding or testing phase
I can say that lets say a detected it
That there is some problem in design
So over here I can give a feedback and tell the design team
That you can perform some changes in this
In the same way if I saw any changes in system testing
Or lets say if I want some changes in that
Then at backend I can tell the design team or coding team
So this is the major change of feedback
Which is there in the iterative waterfall model
So if you are asked anywhere in university exam
In college university or India competitive exam
Then remember this main point
This is the major difference
The second point is that over here there is no feedback in feasibility study
Your feedback works this way only
But in feasibility study there is no feedback
What is the meaning
Once you have given the commitment
There is a dialogue of Salman Khan that
If I have given commitment once then I don't listen even to myself
The same thing is over here also
That if you have given the commitment once that yes you will develop the software
Now you cannot backtrack
This is the basic concept over here
Feedback one
If we talk other than that the other points are same only
The advantages which were there like base model
Simple and easy
It is good for small projects
Which one is extra? Feedback
Which is one extra concept over here
Feedbacks are there in the iterative waterfall model
If you talk about the disadvantages then the remaining disadvantages which were there
Same exists over here also
Like no phase overlapping
What is this? Parallelism
In that parallelism was written
So over here no phase overlapping
That means one phase will complete after that another phase will start
Then the 3rd one then the 4th one
That means you cannot work parallelly at a time
This is the problem in it
Then no intermediate delivery
What is the meaning over here
That you have started a project
From feasibility study to maintenance
When this whole software will get completed
Then you will deliver it to your customer
After completing the work you delivered
In between there is no partial delivery
What is the meaning
Let's say if any problem comes
Customer can find that problem
Then that problem can be highlighted only after delivering the whole software
If there is any intermediate or prototype kind of concept
That I make a small prototype and give it to them
And that only I say that tell some changes
Which will come ahead in the prototype model
So that would have been a bit advantage over here
But this thing is not like that
Then what is the meaning of rigid no changes over here
If you talk about no changes or rigidity
Then let's say I have fixed the requirement
That these are my requirements
Then those requirements are fixed
I have freezed them in a way
If I want to do any changes in your requirement in next phases
Then it cannot be done
Baby you will feel like that Sir feedback is there in it
So what is the concept of feedbacks it is that
If there is any mistake or any bug comes
Then we can say the previous team that there is some problem over here
But if I freezed the requirement
That these are my requirements
Once my requirements have been fixed
After that I cannot bring changes in them again and again
So this rigidity is still there
Less customer interaction
Office here told you earlier also about customer interaction
That we have asked the customers over here
We have got the SRS document signed
After that the customer will directly come over here
Because when the product will be delivered to him at that time he will actually use it
You will deliver the whole software in one time
So you can tell them as major facts or major points
In the iterative waterfall model
There is nothing out of this
Even if you know these many points
It is more than sufficient
Thank you
関連動画をさらに表示
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