Incremental Model in Software Engineering | SDLC

Summary

This video tutorial introduces the Incremental Model, a software development approach where projects are built module by module rather than all at once. It's particularly beneficial for large projects, allowing for early releases and customer feedback integration. Key advantages include maximized customer interaction, reduced error chances, balanced cost and resource allocation, and flexibility to incorporate changes. The Incremental Model is ideal for mobile and web applications, ensuring a steady flow of updates and new features, enhancing user experience.

Takeaways

• 🔄 Incremental Model is a software development approach where the software is developed and delivered in a series of increments or modules.
• 🛠️ It is particularly suitable for large projects, allowing for the development of a single module at a time, which can then be expanded upon.
• 🏫 An example given is an LMS (Learning Management System), where different modules for students, teachers, and administrative staff are developed incrementally.
• 🔒 The process begins with a locked phase of requirements and specifications, leading to the creation of an SRS (Software Requirements Specification) document.
• 🔑 Build 1 represents the first module development, which includes designing, development, testing, maintenance, and implementation.
• 🤝 Customer interaction is maximized in the Incremental Model, leading to better feedback and reduced chances of errors.
• 💼 It allows for a balanced cost application, as resources and finances are allocated incrementally rather than all at once.
• 📈 Suitable for product-based companies that want to launch features early, meeting early market demands and providing a steady rollout of features.
• 📱 Ideal for mobile and web applications that receive regular updates, reflecting the incremental development and addition of features.
• 🔀 Highly flexible to changes, as each module can be individually updated or modified without affecting the entire system.

Q & A

What is the Incremental Model in software development?

The Incremental Model is a software development approach where the software is built and delivered in increments or modules, rather than all at once. This allows for iterative development and testing of each module before moving on to the next.

Why is the Incremental Model particularly suitable for large projects?

The Incremental Model is suitable for large projects because it breaks down the development into smaller, more manageable modules. This makes it easier to manage, test, and maintain, and allows for early delivery of some functionalities to the end-users.

Can you provide an example of how the Incremental Model is applied in a real-life scenario?

Yes, a real-life example is a Learning Management System (LMS) where different modules like student, teacher, and administrative modules are developed incrementally. Initially, perhaps the attendance module is developed, followed by modules for uploading materials, and so on.

What is the significance of the 'lock' phase in the Incremental Model?

The 'lock' phase in the Incremental Model refers to the stage where all the requirements and specifications are finalized and documented, typically in an SRS (Software Requirements Specification) document, before the development of the first module begins.

How does the Incremental Model affect customer interaction during the development process?

The Incremental Model maximizes customer interaction as each module is delivered to the customer for use and feedback. This allows for continuous improvement and ensures that the final product meets the customer's evolving needs.

What are the advantages of the Incremental Model in terms of cost management?

The Incremental Model allows for a balanced cost application as resources and funds are allocated incrementally with each module. This prevents the need for a large upfront investment and helps in managing costs more effectively.

How does the Incremental Model facilitate early product release?

The Incremental Model enables early product release by allowing the delivery of the first functional module to the market. This can help satisfy early demand and provide a competitive advantage.

Is the Incremental Model beneficial for mobile and web applications? If yes, how?

Yes, the Incremental Model is beneficial for mobile and web applications as it allows for regular updates and the addition of new features, which keeps the application fresh and responsive to user needs.

What is the relationship between the Incremental Model and flexibility to changes?

The Incremental Model offers high flexibility to changes because it allows for modifications and updates in each module as they are developed. This means the product can evolve in response to user feedback and technological advancements.

What are the key points to consider when adopting the Incremental Model?

When adopting the Incremental Model, key points to consider include proper requirement locking, phased development and testing of modules, continuous customer interaction, balanced cost management, and the ability to adapt to changes flexibly.

Outlines

00:00

🚀 Introduction to Incremental Model

The speaker welcomes students to a video discussing the Incremental Model, emphasizing its relevance for competitive exams, university exams, and interviews. They encourage viewers to like, subscribe, and share the video. The Incremental Model is defined as a development approach where modules are created one after another, rather than all at once. This is particularly useful for large projects, such as a Learning Management System (LMS), where different modules like student, teacher, and administrative functionalities are developed incrementally. The speaker uses the LMS as an example to illustrate how development is done in phases, starting with the attendance module and then adding more features like online material upload. The process involves locking down the requirements and specifications first, creating the Software Requirements Specification (SRS) document, and then proceeding with development, testing, and maintenance in a step-by-step manner. The speaker highlights the advantages of this model, including maximum customer interaction, which minimizes errors, and the ability to balance costs and resources over time.

05:00

🔄 Advantages of Incremental Model

The second paragraph delves into the advantages of the Incremental Model, focusing on its flexibility and the ability to adapt to changes. The speaker points out that since development is not done all at once, it allows for modifications and updates to individual modules without affecting the entire system. This flexibility is crucial for large projects and product-based companies that aim for an early release of their products. The model is also beneficial for mobile and web applications that require regular updates and feature additions. The speaker concludes by emphasizing the model's suitability for applications that need to be updated frequently, using the example of mobile applications that receive updates to include new features over time.

Keywords

💡Incremental Model

The Incremental Model refers to a software development approach where the software is built and delivered in multiple increments or iterations, rather than all at once. This model is particularly useful for large projects where it allows for early delivery of a product's core functionality, followed by additional features in subsequent releases. In the script, the Incremental Model is used to explain how a Learning Management System (LMS) can be developed module by module, starting with an attendance module and then incrementally adding modules for students, teachers, and administrative functions.

💡Module

A module in the context of software development is a self-contained component that performs a specific function or set of functions. The Incremental Model emphasizes the development of modules, which are then integrated into the final product. The script uses the example of an LMS to illustrate how different modules like student, teacher, and attendance modules are developed and added incrementally to the system.

💡Development

Development in the script refers to the process of creating and building software modules. It is a core activity in the Incremental Model, where each module is developed separately and then integrated. The script discusses how development starts with the first module and continues through subsequent builds, highlighting the iterative nature of this process.

💡Customer Interaction

Customer interaction is emphasized in the Incremental Model as a way to gather feedback and make necessary adjustments before moving on to the next module. The script mentions that by giving the customer module 1, they can use it and provide insights on what changes or additions they would like to see in the next module, thus minimizing errors and improving the final product.

💡Cost and Manpower

The script discusses how the Incremental Model helps in managing costs and manpower more effectively. Instead of investing all resources at once, the model allows for a phased approach where only a portion of the total cost and manpower is required for each module. This is beneficial for both the development team and the customer, as it spreads out the financial burden and allows for more controlled resource allocation.

💡SRS Document

The Software Requirements Specification (SRS) document is a key component in the Incremental Model, as it outlines the requirements and specifications for the software before development begins. The script mentions that the SRS document is created after the requirement phase is 'locked,' which means all the necessary requirements and specifications have been agreed upon and documented.

💡Testing

Testing is a critical phase in the Incremental Model where each module is tested for functionality and reliability before it is released. The script implies that after the development and design of each module, it undergoes testing to ensure it meets the specified requirements and is free from defects.

💡Maintenance

Maintenance refers to the ongoing process of fixing bugs, updating, and improving software after it has been released. In the context of the Incremental Model, maintenance is an important step after each module is implemented, ensuring that it continues to function correctly and meets user needs. The script suggests that maintenance is part of the iterative process of developing and refining each module.

💡Phases

Phases in the Incremental Model represent the different stages of software development, from requirement gathering to design, development, testing, and maintenance. The script outlines the phases as a structured approach to ensure that each aspect of the software is properly addressed and completed before moving on to the next module.

💡Flexibility

Flexibility is a key advantage of the Incremental Model, as it allows for changes and adjustments to be made more easily throughout the development process. The script highlights that because development occurs in increments, it is possible to make changes to a module without affecting the entire system, thus accommodating evolving customer needs and technological advancements.

💡Early Release

An early release in the context of the Incremental Model means delivering the first functional module or a portion of the software to the customer before the entire system is complete. The script explains that this approach is beneficial for companies that want to meet early product demand or for applications that need to be updated frequently, such as mobile or web applications.

Highlights

Incremental Model is a development approach where modules are developed one by one rather than all at once.

This model is particularly useful for large projects, allowing for phased development and implementation.

The Incremental Model is exemplified by a Learning Management System (LMS), where different modules for students, teachers, and administrators are developed separately.

The process begins with the requirement and specifications phase, where the Software Requirements Specification (SRS) document is created.

Development starts with Build 1, focusing on the first module, including design, development, testing, maintenance, and implementation.

Customer interaction is maximized in the Incremental Model, leading to minimal error chances as feedback is incorporated after each module.

Cost and resource allocation are more manageable, as only a portion of the total is required for each module's development.

The model is beneficial for product-based companies looking to launch features early, meeting market demands promptly.

Mobile and web applications often use the Incremental Model, releasing updates with new features incrementally.

The model allows for flexibility in changes, as each module can be updated or modified after it has been released.

The Incremental Model is ideal for projects that require frequent updates and customer feedback integration.

Each module's development is a step-by-step process, ensuring that each part is thoroughly tested and refined.

The model is advantageous for managing large-scale projects where a complete simultaneous development would be overwhelming.

The Incremental Model facilitates a gradual release of features, which can help in managing customer expectations and feedback.

This model is also suitable for environments where resources are limited, as development can be paced according to availability.

The Incremental Model promotes a customer-centric approach, as development is driven by feedback and interaction after each module release.

The model is adaptable to changes in market trends and customer preferences, as new modules can be quickly developed to respond.

The Incremental Model supports a continuous development cycle, where each module's completion leads to the next phase of development.

Transcripts

Dear students welcome to gate smashers

In this video i am going to explain

What is Incremental Model?

Related to incremental model

We will discuss each and every point and fact in this fact.

Whether you are preparing for competitive exam

foreign university exam or for interview.

If you are asked anywhere

Then these points are more than sufficient.

Fastly like the video and subscribe the channel.

If you have not done till yet

If you have already done

Then you can share and subscribe from other devices

because subscribers are so much important.

So come let's start

Incremental Model

What is the meaning of Incremental?

It means we are developing module by module

Rather than doing development at a single time

Firstly we created a single module

After that we created second module

which is Incremental.

Such as firstly we created a small module.

After that we added one more module inside that.

Then inside that we added one more module.

Therefore we say this Incremental model.

If it is a large project

It is specially for the large projects

If it is big project

Let me take a real life simple example LMS.

Learning management system

As your college or university has learning management system

Then see there

Student have a separate module

Teachers have a separate module

Dean & HOD have a separate module

There is a separate module of attendance.

If there is any cultural cell or placement cell then it will have a separate module.

What i mean to say?

I did not did complete development at a single time.

I firstly asked to create attendance module

I can take online attendance

Students can see their attendance online.

I firstly created that.

After that i felt this module is completely right.

Then we can see and take teachers attendance online.

Then we started uploading material

Teachers can upload the material

Students can see that materials

What i mean to say?

Rather than creating software for a single time

You are doing development module by module.

See first phase comes requirement

The phase of requirement and specifications

You have to lock that phase first.

What is the meaning of lock?

Not down all the requirements and specifications

Note down each and everything properly.

SRS document will create here

After creation of SRS document

After that you have started the development

Firstly you create build 1

Build 1 means you created first module

In that firstly you did designing, dvelopment.

Then comes testing

After that you maintained that and implemented.

Finally then you will go to Build 2 Module 2, 3, 4.

By this way you are doing development module by module.

Now in your mind it must have come

What are the advantages and disadvantages?

So if we talk about its points

Then see i am saying again and again module by module.

Then customer interaction is maximum.

See here you are giving module 1

You gave module 1 to customer

Customer is using that module

While using that he came to know

What changes i need in next one.

What i want to added

What i wanted to be removed

Here customer interaction is maximum.

So error chances will be minimum

Your error chances will be minimum.

This is a major development and advantage.

Second important point comes here

You got any software

Now you have to create completely at a single time.

Then you have to apply cost also at a single time.

Company have to apply whole cost and manpower for a single time.

You took all the money from customer.

No what we are doing

We are creating a module 1

You are provided a time duration.

In this much time we will provide you module 1.

We took some percentage amount from him

We took 20% or 30%

We did not applied whole manpower, cost, machinery.

We did not take each and everthing for a single time.

We created according to this.

After that we will go to second and third

Somewhere it keeps balanced costwise.

You don't have such need to apply whole manpower suddenly.

This is a advantage that occurs here.

Then this is very much important for large projects.

They are applications or product based company.

They want to launch a product

Rather than doing whole at a single time

It is also beneficial for the early release product demand.

Means any product demand is coming early

Means release that as soon as possible.

If i cannot do whole at a single time.

Then i can early release its some part or portion.

Therefore i am saying this model is better for

your mobile application, android, web application.

As you have seen when you install mobile application, web application.

What happens in that?

Updation comes time to time

Especially for the mobile application in android

You downloaded any application

You are using it

After one month updation comes in that

So you will update

Then new features will include

After that when you update after 2 month

Then new features will include

Mean to say

They are trying to maintain each and every thing in a step by step manner.

This is a advantage.

Then flexible to the change

Rest of the points have come into your mind

Now make as many stories as you want

Obviously it is flexible to changes.

We are not doing at a single chance.

Firstly we created a module one

Any change we want to do in that

We can do that changes also.

It is not such that we are maintaining that whole product after implementing that.

Then we are findings error

We are seeing customer interaction properly

There is no error

We are checking again and again in user testing phase.

Somewhere flexibility becomes here

Whatever changes you want to do

These are the major points related to the Incremental model.

Thankyou