Author: saqibkhan

This evolutionary model concept comes into the picture after the user faces the partially developed system rather than waiting for the fully developed version. The idea of this evolutionary model comes from developing the core module and then improving the software product by using iterative and incremental techniques with appropriate feedback.

In this evolutionary process model, the software product is in the sensitive version, which is made through many iterations, and then the final product is prepared. This evolutionary approach also suggests breaking down all the models into maintainable smaller chunks. After that, we can prioritize all the smaller products. After completing all the products, we can deliver those chunks one at a time to the users.

It plays a vital role in large projects where we can easily search the module for the implementation of incremental things. It is also an influential model because it collects customer feedback throughout the development process, and the customer can use the base feature of the project before the release of the entire working version.

What is the Evolutionary Model?

The evolutionary model is also known as successive versions or incremental models. The main aim of this evolutionary model is to deliver the products in total processes over time. It also combines the iterative and collective model of the software development life cycle (SDLC).

Based on the evolutionary model, we can divide the development model into many modules to help the developer build and transfer incrementally. On the other hand, we can also develop the skeleton of the initial product. Also, it refines the project to increase levels of capability by adding new functionalities in successive versions.

Characteristics of the Evolutionary Model

There are so many characteristics of using the evolutionary model in our project. These characteristics are as follows.

• We can develop the evolutionary model with the help of an iterative waterfall model of development.
• There are three types of evolutionary models. These are the Iterative model, Incremental model and Spiral model.
• Many primary needs and architectural planning must be done
• to implement the evolutionary model.
• When the new product version is released, it includes the new functionality and some changes in the existing product, which are also released with the latest version.
• This model also permits the developer to change the requirement, and the developer can divide the process into different manageable work modules.
• The development team also have to respond to customer feedback throughout the development process by frequently altering the product, strategy, or process.

Prototyping Model

We can define this prototyping model as the first form using all other forms created or copied. We can also call the prototyping model the set of general objects that helps to create the software. We can not identify the input and output of requirement details. We can develop the program quickly with the help of this model. We have some different phases of using this prototyping model. These are as follows.

• Communication
  In this phase, the client and the developer should have a meeting, and in that meeting, they discuss the main objective of creating the project.
• Quick design
  When we have the requirements known to the developer, then the developer can implement the quick design. The quick design includes implementing important aspects, such as the input and output format of the software. The main focus of this project is on the things visible to the user rather than the detailed plan. With the help of this, we can also create the prototype of the project.
• Modelling quick design
  In this phase, we can get a clear idea about the software development because the software is now in the build state. Also, it allows the developer to understand the project’s basic requirements.
• Construction of prototype
  The customer evaluates the prototype of the project.
• Deployment, delivery, feedback
  If the client is unsatisfied with the project, then the developer can recreate the project according to the client’s satisfaction. This process repeats until the client is fully satisfied. After the client is happy, the project will be developed based on the final prototype.

Advantages of the Prototyping Model

There are so many benefits of using the prototype model. These are as follows:

• The prototype model does not need detailed input, output, processes, adaptability of the operating system, or entire machine interaction.
• The user is fully active in the development process of this model.
• The development process is the best platform for users to understand the project.
• We can easily detect the error with the help of this prototyping model.
• It also identifies the missing functionality very quickly.
• It also identifies the confusing or difficult functions.

Disadvantages of the Prototyping Model

Using a prototyping model also has some disadvantages. These are as follows.

• In this model, the involvement of the client is greater. So, it is not always considered by the developer.
• The development time is longer, so it is a prolonged process.
• The developer has to perform so many changes according to the client’s demand. It disturbs the rhythm of the development process.
• When the user is confused with the prototype, then this prototype will be thrown away.

Spiral Model

This model is also known as the risk-driven process model. With the help of this spiral model, we can generate the software project. During the risk analysis, if a risk is found, an alternate solution should be suggested and implemented in the spiral model. We can also say that it combines the sequential or waterfall models and the prototype models. All the required activities are done in one iteration. The output of the large project is small.

The framework activities of the spiral model are as shown below.

Advantages of the Spiral Model

There are so many benefits of using the spiral model. These are as follows:

• The amount of risk should be reduced in this model.
• This model is best for large and critical projects.
• It provides the developer with solid approval and documentation control.
• The software production time is less in this spiral model.

Disadvantages of Spiral Model

It also has some disadvantages to using the spiral model. These are as follows.

• We need a lot of financial support to develop a project.
• We should not use this model for a very small project.

Concurrent Development Model

We also called this concurrent development model a concurrent model. In the first iteration process, all the communication activity has been completed. After completing the first iteration, it exits in the awaiting changes state. Also, in the initial phases, The modelling activity was completed. After completion of the initial phases, it goes to the underdevelopment state. If the customer wants some changes in the software product, then the modelling activity moves from the under-development state into the awaiting change state. This concurrent model changes from one activity to another activity.

Advantages of the Concurrent Development Model

There are so many benefits of using the concurrent development model. These are as follows:

• We can use this model in all types of software development processes.
• It is so much easier to understand.
• It also provides immediate feedback after the testing process is done.
• It also provides an accurate picture of the state of the project.

Disadvantages of the Concurrent Development Model

Using the concurrent development model also has some disadvantages. These are as follows.

• We have to improve communication between the team members.
• It requires remembering the status of the different activities.

Comparison of the Evolutionary Model with Other Models

1. Evolutionary Model vs Incremental Model

Evolutionary	Incremental
The requirement of this evolutionary model is not a requirement. The development can be changed according to the development process.	The requirements for this incremental model are precise and based on the development team.
In this evolutionary model, the initial step is understanding the customer’s requirements. Also, it involves the development of the core modules and functionality. After completing all the phases, they have to deliver the product to the customer for feedback.	In this incremental model, each module is defined with multiple iterations. We can also add new functionality during the development of the product. After completing all the steps, we have to release the deliverable product.
The activities of the complete cycle are repeated for each new product version.	Each module is developed, tested, and released at various intervals.
In this model, the development time is unknown for the developer. Also, the developer can not track the progress of the software product.	In this model, the development time is known to the developer. Also, the developer can track the progress of the software product.

2. Evolutionary Model vs Iterative Model

Evolutionary Model	Iterative Model
In this model, different modules are released in incremental order before releasing the final product.	It follows the process of the sequential development process. After completion of the development of the software product, it releases the final product.
There will be a chance of delivery of actual product be late.	In this model, the product will be delivered within the time.
In this module, the integration of the module will be complex.	This model makes it much easier to understand and implement the product.
We can use this module only for large products.	It is the most commonly used module in the software industry.

3. Evolutionary Model vs Classical Waterfall Model

Evolutionary Model	Classical Waterfall Model
In this model, we can deal with the different versions of the software.	In this model, we can deal with things according to the things mentioned in the testing manual.
In this model, integration is going to be complicated.	In this model, it is going to be simple to use, understand and implement.
This model accepts customer feedback during the development of the project.	In this model, there is no need for customer feedback.
In this model, we can detect the error in the core module of the project.	In this phase, we can detect the error in every development step.
If we need to add any new functionality, we have to release the latest product, and the existing functionalities may be updated.	After the completion of the development of the final product, we can not add any update to it.

4. Evolutionary Model vs Spiral Model

Evolutionary Model	Spiral Model
In this model, we can develop the software incrementally with the help of different modules.	In this model, all the modules are divided into many loops, further divided into four quadrants.
We can use this module only for large products.	We can use this model to develop technically difficult software products vulnerable to different threats.
In this model, Every version can fully function the mentioned functionalities.	In this module, each model contains a set of activities that the software performs.

Advantages of the Evolutionary Model

There are so many benefits of using the evolutionary model. These benefits are as follows.

• In the evolutionary model, the user can test partially developed software before the release of the final product in the market.
• In this model, we can test the core module, which reduces the chances of errors in the final product.
• We can use this module only for large products.
• We can use this model to develop a software product with some unique features. We can modify these specific features based on customer feedback and many factors throughout development.
• With the help of this evolutionary model, we can get to know the client’s requirements during the delivery of different versions of the software.
• After completion of each cycle, the user can access the product.
• Using an evolutionary model removes the requirement to allocate significant resources simultaneously for system development.

Disadvantages of the Evolutionary Model

There are also many disadvantages to using this model. These are as follows.

• It is difficult to divide the problem into functionality units that the user accepts. After receiving the user, this problem should be incrementally implemented, and after that, it should be delivered.
• There will be a chance of being late in the delivery of the final product. There will be a chance that the market can go down due to different customer changes during development.
• In this module, the chances of risk factors are high. There is always a need to report customers continuously.

The prototype model requires that before carrying out the development of actual software, a working prototype of the system should be built. A prototype is a toy implementation of the system. A prototype usually turns out to be a very crude version of the actual system, possible exhibiting limited functional capabilities, low reliability, and inefficient performance as compared to actual software. In many instances, the client only has a general view of what is expected from the software product. In such a scenario where there is an absence of detailed information regarding the input to the system, the processing needs, and the output requirement, the prototyping model may be employed.

Steps of Prototype Model

1. Requirement Gathering and Analyst
2. Quick Decision
3. Build a Prototype
4. Assessment or User Evaluation
5. Prototype Refinement
6. Engineer Product

Advantage of Prototype Model

1. Reduce the risk of incorrect user requirement
2. Good where requirement are changing/uncommitted
3. Regular visible process aids management
4. Support early product marketing
5. Reduce Maintenance cost.
6. Errors can be detected much earlier as the system is made side by side.

Disadvantage of Prototype Model

1. An unstable/badly implemented prototype often becomes the final product.
2. Require extensive customer collaboration
   • Costs customer money
   • Needs committed customer
   • Difficult to finish if customer withdraw
   • May be too customer specific, no broad market
3. Difficult to know how long the project will last.
4. Easy to fall back into the code and fix without proper requirement analysis, design, customer evaluation, and feedback.
5. Prototyping tools are expensive.
6. Special tools & techniques are required to build a prototype.
7. It is a time-consuming process.

Evolutionary Process Model

Evolutionary process model resembles the iterative enhancement model. The same phases are defined for the waterfall model occurs here in a cyclical fashion. This model differs from the iterative enhancement model in the sense that this does not require a useful product at the end of each cycle. In evolutionary development, requirements are implemented by category rather than by priority.

For example, in a simple database application, one cycle might implement the graphical user Interface (GUI), another file manipulation, another queries and another updates. All four cycles must complete before there is a working product available. GUI allows the users to interact with the system, file manipulation allow the data to be saved and retrieved, queries allow user to get out of the system, and updates allows users to put data into the system.

Benefits of Evolutionary Process Model

• Use of EVO brings a significant reduction in risk for software projects.
• EVO can reduce costs by providing a structured, disciplined avenue for experimentation.
• EVO allows the marketing department access to early deliveries, facilitating the development of documentation and demonstration.
• Better fit the product to user needs and market requirements.
• Manage project risk with the definition of early cycle content.
• Uncover key issues early and focus attention appropriately.
• Increase the opportunity to hit market windows.
• Accelerate sales cycles with early customer exposure.
• Increase management visibility of project progress.
• Increase product team productivity and motivations.

Steps of Prototype Model:

1. Gathering and assessing needs: In order to comprehend the needs and expectations of the community for which the product is being designed this stage involves working with them and achieving their objectives.
2. Quick Designing: According to the specifications gathered in the first step the model’s bird-view design is created. It’s possible that the models design is more intricate and sophisticated. It is like a preliminary draft.
3. Building a prototype: Currently an actual model is being created using the raw model produced in step 2 with all the data gathered in step 1. Each component is described in greater detail.
4. User Evaluation or review: Since creating prototype models is an iterative process a user review is necessary each time a temporary model is constructed. The concerned user gives input after looking over the current prototype model. The developer receives these and uses them in the upcoming version.
5. Enhancement of Prototype: The developer then considers the users reviews and suggestions and makes any necessary changes to the current system. This process continues until the user is positive that the model meets his needs.
6. Implement and maintain the product: The model is developed and applied in compliance with user specifications. Based on the built model the implementation is carried out. The system or product is regularly maintained to minimize downtime and prevent significant failures.

Types of prototyping:

These are the prototype models for the different types. A variety of criteria including implementation, cost-effectiveness, and user involvement can be used to classify them.

1. Fast Throwaway Prototyping
2. Evolutionary prototyping
3. Incremental prototyping
4. Extreme prototyping

Rapid (or) Throwaway prototyping:

With this kind of prototyping the model is made quickly and discarded as soon as the product or design is built. It is advantageous to get to the past prototyping phase quickly. The purpose of this kind of prototyping is to get a feel for how the finished product will look. Every shift in demand is advertised while taking consumer input into account. Until there is very little need, the prototype is repeated.

Evolutionary prototyping:

For this kind a prototype model is first built. After that the client needs and requirements are assessed and integrated into the current model. The review and modifications are made until the client is entirely satisfied. In high-end projects where every feature is tested and when a project involves an unidentified replacement technology evolutionary prototyping is usually used. We can avoid wasting time and effort by employing this prototyping method.

Incremental Prototyping:

In incremental prototyping several tiny prototype models are constructed at the same time. All of these models were created with the client needs in mind. Then they can be considered separately or integrated into a single practical model. Incremental prototyping can shorten the time it takes for the development team and users to offer feedback. Consequently, it can be referred to as an iterative process that entails the construction of multiple stages. Incremental prototyping is used to enhance the prototype model. There is a risk associated with incremental prototyping though the model may appear to be a totally different piece of software as a result of the significant changes in appearance that occur during the process.

Extreme prototyping:

This kind of prototyping is used in the creation of web applications. Three parts make up the web development process each of which builds upon the one before it. Developers and customers must work closely together to achieve extreme prototyping. Extreme prototyping is done in three steps.

1. Building: HTML wireframes are created to energize the presentation layer.
2. Transformation: The wireframes are transformed into fully functional HTML pages. This connects them to the simulated service layer.
3. Implementation: After coding the service layer is activated.

Advantages of Prototype Model:

There are benefits for using prototype models. The benefits of the prototype models are as follows:

1. The customers/users are quite happy with the product since they can check the model at every stage make recommendations and ensure it meets their needs.
2. The likelihood that the product will fail is decreased because these factors were already carefully considered during the prototype development process.
3. It provides space for the client to articulate his ideas as they emerge. Only a few of the prerequisites are initially required.
4. The system or product can be created by a small team of skilled developers.
5. Flexibility in construction.
6. Cuts down on the time and cost involved in creating a product.

Disadvantages of the prototype model:

The following are some of the disadvantages of the prototype model:

1. The procedure is slow and tedious.
2. Customer interaction and interference occur at every stage of the process.
3. Customers have the choice to switch product developers if they are happy with the initial designs. As a result, the developers might incur significant expenses.
4. With the money used to create the prototype model could be more accomplished. This is because the prototype is no longer useful once the final product is developed.
5. The built model is encouraged to undergo unnecessary changes.

Applications of software engineering prototype model:

The prototype model is widely used in the following fields.

1. Game development: During this phase a vertical slice of the proof of concept or a streamlined version of the game is created with the help of the prototype model.
2. Web development: To identify possible problems in this area of development, it is helpful to create a dummy functional website. An early prototype of the product is made in order to gather feedback from users and stakeholders.
3. User interface design: Prototype models are commonly used by user designers to test concepts and explore features.
4. Application Development: As part of the prototype model application development process also called a mockup (or) wireframe, is a condensed version of the application.

Top Prototyping Techniques:

The prototype model is essential to the efficient functioning of the software engineering development process as is widely recognized. It means that before development actually starts the first working model is made while considering all requirements and incorporating feedback. Here are some best practices for prototyping.

• It’s important to be clear when we want to use prototyping. It is best to use it in situations where there is uncertainty.
• We should employ planned and controlled prototyping. It follows that we should only consider the most important factors and not overdo it, so as not to complicate the model.
• During the prototyping phase it is essential to conduct regular meetings and collect pertinent feedback for the projects.
• Consideration must be given to important pitfalls.
• Prioritizing important information is necessary when sorting through the components of various topics.
• Testing on a variety of devices should be done to ensure the models efficiency. For example, we test a websites responsiveness on a variety of devices while it is being developed.

In this model, developers do not follow any specific process. Development begins with the necessary funds and efforts in the form of inputs. And the result may or may not be as per the customer’s requirement, because in this model, even the customer requirements are not defined.

This model is ideal for small projects like academic projects or practical projects. One or two developers can work together on this model.

When to use Big Bang Model?

As we discussed above, this model is required when this project is small like an academic project or a practical project. This method is also used when the size of the developer team is small and when requirements are not defined, and the release date is not confirmed or given by the customer.

Advantage(Pros) of Big Bang Model:

1. There is no planning required.
2. Simple Model.
3. Few resources required.
4. Easy to manage.
5. Flexible for developers.

Disadvantage(Cons) of Big Bang Model:

1. There are high risk and uncertainty.
2. Not acceptable for a large project.
3. If requirements are not clear that can cause very expensive.

In this Model, you can start with some of the software specifications and develop the first version of the software. After the first version if there is a need to change the software, then a new version of the software is created with a new iteration. Every release of the Iterative Model finishes in an exact and fixed period that is called iteration.

The Iterative Model allows the accessing earlier phases, in which the variations made respectively. The final output of the project renewed at the end of the Software Development Life Cycle (SDLC) process.

The various phases of Iterative model are as follows:

1. Requirement gathering & analysis: In this phase, requirements are gathered from customers and check by an analyst whether requirements will fulfil or not. Analyst checks that need will achieve within budget or not. After all of this, the software team skips to the next phase.

2. Design: In the design phase, team design the software by the different diagrams like Data Flow diagram, activity diagram, class diagram, state transition diagram, etc.

3. Implementation: In the implementation, requirements are written in the coding language and transformed into computer programmes which are called Software.

4. Testing: After completing the coding phase, software testing starts using different test methods. There are many test methods, but the most common are white box, black box, and grey box test methods.

5. Deployment: After completing all the phases, software is deployed to its work environment.

6. Review: In this phase, after the product deployment, review phase is performed to check the behaviour and validity of the developed product. And if there are any error found then the process starts again from the requirement gathering.

7. Maintenance: In the maintenance phase, after deployment of the software in the working environment there may be some bugs, some errors or new updates are required. Maintenance involves debugging and new addition options.

When to use the Iterative Model?

1. When requirements are defined clearly and easy to understand.
2. When the software application is large.
3. When there is a requirement of changes in future.

Advantage(Pros) of Iterative Model:

1. Testing and debugging during smaller iteration is easy.
2. A Parallel development can plan.
3. It is easily acceptable to ever-changing needs of the project.
4. Risks are identified and resolved during iteration.
5. Limited time spent on documentation and extra time on designing.

Disadvantage(Cons) of Iterative Model:

1. It is not suitable for smaller projects.
2. More Resources may be required.
3. Design can be changed again and again because of imperfect requirements.
4. Requirement changes can cause over budget.
5. Project completion date not confirmed because of changing requirements.

The meaning of Agile is swift or versatile. “Agile process model” refers to a software development approach based on iterative development. Agile methods break tasks into smaller iterations, or parts do not directly involve long term planning. The project scope and requirements are laid down at the beginning of the development process. Plans regarding the number of iterations, the duration and the scope of each iteration are clearly defined in advance.

Each iteration is considered as a short time “frame” in the Agile process model, which typically lasts from one to four weeks. The division of the entire project into smaller parts helps to minimize the project risk and to reduce the overall project delivery time requirements. Each iteration involves a team working through a full software development life cycle including planning, requirements analysis, design, coding, and testing before a working product is demonstrated to the client.

Phases of Agile Model:

Following are the phases in the Agile model are as follows:

1. Requirements gathering
2. Design the requirements
3. Construction/ iteration
4. Testing/ Quality assurance
5. Deployment
6. Feedback

1. Requirements gathering: In this phase, you must define the requirements. You should explain business opportunities and plan the time and effort needed to build the project. Based on this information, you can evaluate technical and economic feasibility.

2. Design the requirements: When you have identified the project, work with stakeholders to define requirements. You can use the user flow diagram or the high-level UML diagram to show the work of new features and show how it will apply to your existing system.

3. Construction/ iteration: When the team defines the requirements, the work begins. Designers and developers start working on their project, which aims to deploy a working product. The product will undergo various stages of improvement, so it includes simple, minimal functionality.

4. Testing: In this phase, the Quality Assurance team examines the product’s performance and looks for the bug.

5. Deployment: In this phase, the team issues a product for the user’s work environment.

6. Feedback: After releasing the product, the last step is feedback. In this, the team receives feedback about the product and works through the feedback.

Agile Testing Methods:

Every Agile technique aims to produce functional software as quickly as feasible while embracing and adapting to change. Each approach differs, though, in how it outlines the stages involved in software development. The following are some of the most popular Agile techniques:

• Scrum
• Crystal
• Dynamic Software Development Method(DSDM)
• Feature Driven Development(FDD)
• Lean Software Development
• eXtreme Programming(XP)

Scrum

SCRUM is an agile development process focused primarily on ways to manage tasks in team-based development conditions.

There are three roles in it, and their responsibilities are:

• Scrum Master: The scrum can set up the master team, arrange the meeting and remove obstacles for the process
• Product owner: The product owner makes the product backlog, prioritizes the delay and is responsible for the distribution of functionality on each repetition.
• Scrum Team: The team manages its work and organizes the work to complete the sprint or cycle.

eXtreme Programming(XP)

Extreme programming (XP) is a methodical technique that emphasizes continuous Delivery and speed. It encourages close cooperation, constant planning and testing, quick feedback loops, and greater customer participation. Frequent software delivery occurs, often every one to three weeks. The aim is to enhance software responsiveness and quality in response to evolving client needs.

The principles of boldness, simplicity, communication, and feedback form the foundation of the XP technique.

Crystal:

There are three concepts of this method-

1. Chartering: Multi activities are involved in this phase such as making a development team, performing feasibility analysis, developing plans, etc.
2. Cyclic delivery: under this, two more cycles consist, these are:
   • Team updates the release plan.
   • Integrated product delivers to the users.
3. Wrap up: According to the user environment, this phase performs deployment, post-deployment.

Dynamic Software Development Method(DSDM):

DSDM is a rapid application development strategy for software development and gives an agile project distribution structure. The essential features of DSDM are that users must be actively connected, and teams have been given the right to make decisions. The techniques used in DSDM are:

1. Time Boxing
2. MoSCoW Rules
3. Prototyping

The DSDM project contains seven stages:

1. Pre-project
2. Feasibility Study
3. Business Study
4. Functional Model Iteration
5. Design and build Iteration
6. Implementation
7. Post-project

Feature Driven Development(FDD):

This method focuses on “Designing and Building” features. In contrast to other smart methods, FDD describes the small steps of the work that should be obtained separately per function.

Lean Software Development:

Lean software development methodology follows the principle “just in time production.” The lean method indicates the increasing speed of software development and reducing costs. Lean development can be summarized in seven phases.

1. Eliminating Waste
2. Amplifying learning
3. Defer commitment (deciding as late as possible)
4. Early delivery
5. Empowering the team
6. Building Integrity
7. Optimize the whole

The Agile 12 Principles

The following 12 fundamental development process concepts were also delineated in The Agile Manifesto:

1. Deliver quality work on time and consistently to satisfy clients.
2. Divide large projects into manageable, short-term activities.
3. Understand that self-organized teams provide the greatest work.
4. Give driven people the space and assistance they require and have faith in their ability to complete the task at hand.
5. Establish procedures that encourage sustainable endeavors.
6. Keep up a steady pace to finish the assignment.
7. Accept requirements that change, even at the end of a project.
8. Throughout the project, bring together the business owners and the project team every day.
9. Encourage the team to regularly consider ways to improve their effectiveness and modify and adapt their behavior accordingly.
10. The quantity of finished work is a good way to gauge progress.
11. Always strive for greatness.
12. Take advantage of change to gain a competitive edge.

When to use the Agile Model?

• When frequent changes are required.
• When a highly qualified and experienced team is available.
• When a customer is ready to have a meeting with a software team all the time.
• When project size is small.

Advantage(Pros) of Agile Method:

The following are some advantages of the Agile methodology:

1. Frequent Delivery
2. Face-to-Face Communication with clients.
3. Efficient design and fulfils the business requirement.
4. Anytime changes are acceptable.
5. It reduces total development time.

Disadvantages(Cons) of Agile Model:

Agile’s lack of focus on technology raises additional possible concerns since it may be challenging to convince senior managers of the idea who are unaware of the importance of culture in software development.

The following are among the drawbacks of Agile Model:

1. Due to the shortage of formal documents, it creates confusion and crucial decisions taken throughout various phases can be misinterpreted at any time by different team members.
2. Due to the lack of proper documentation, once the project completes and the developers allotted to another project, maintenance of the finished project can become a difficulty.

Traditional vs. Agile SDLC Models

The agile and traditional models approach software development differently, each with unique benefits and drawbacks. Both models use distinct approaches and have different uses. Let’s start by defining typical SDLC models.

Conventional SDLC models, which include planning, design, implementation, testing, and maintenance, work well for projects with clearly stated requirements. Each step must be completed before proceeding to the next step. Take the waterfall model, for instance. Let’s compare the two models to better understand their differences.

Conventional SDLC Model	The Agile Model
Software development is approached linearly and sequentially using the conventional SDLC paradigm.	The agile paradigm is a flexible and iterative method for developing software.
Delays may result from the lack of a defined plan to adapt to changing requirements.	It emphasizes feedback, functional software, and adjusting to new specifications.
It emphasizes a well-organized strategy rather than the Delivery of the finished product.	The Agile approach strives for speedy product delivery.
Its emphasis is on documentation, which aids in monitoring the choices and developments made during the project.	The Agile model has no documentation. It consists of frequent gatherings, also referred to as sprint meetings, to monitor the development team’s work.

Use Cases of the Agile Model:

• Software Development: Facilitates the rapid and effective Delivery of small, functional software increments by teams.
• Project management: Promotes ongoing development and flexible planning.
• Product development: Enables goods to be improved and refined based on input from customers.
• Marketing: Iterative testing and improvement of strategies are possible.
• Dynamic Environments: Perfect for situations that call for regular updates and cooperation from stakeholders.

All things considered, the Agile Model’s adaptability and iterative structure make it appropriate for a range of sectors and uses.