What Should Be Your Next SDLC Model? - DZone Agile

There are a lot of different software development life cycle (SDLC) models out there. But deciding on the one best for your next project can be challenging. The two most crucial SDLC models are Agile or v-shaped. 

In this blog post, we will explore the pros and cons of both these SDLC models while also providing some tips on how to choose the right model for your project. 

So without further ado, let’s get started.

What Is Software Development Life Cycle?

The software development life cycle (SDLC) is a framework that defines the steps involved in creating and deploying software. The SDLC can be represented as a linear or waterfall model, or it can be agile or iterative.

The linear or waterfall model is the traditional approach to SDLC, in which each phase must be completed before moving on to the next. This approach is often used for large, complex projects where all of the requirements must be known upfront.

The agile or iterative model is a more flexible approach to SDLC, in which phases are completed in small increments. This approach is often used for smaller projects where requirements may change over time.

Before jumping into Agile and V-shaped comparison, let’s just take a look at what are the different software development life cycle models.

Different Software Development Life Cycle Models

The different software development life cycle models are:

• Linear or waterfall model: In this model, the software development process is conducted in a linear, sequential manner. So basically, each phase of the project has to be completed before moving on to the next one.
• Iterative and incremental model: In this model, the software development process is iterative, with each new iteration building upon the previous one. This allows for more flexible and responsive project management, as well as quicker delivery of working software product increments.
• Agile model: The agile model is a popular iterative and incremental software development methodology that values customer collaboration, working software product increments, and responsiveness to change over processes and tools.
• Spiral model: A spiral model is a risk-driven approach to software development that combines elements of both linear and iterative models. In this model, projects are divided into phases, with each phase consisting of a series of iterations. The number of iterations and phases will depend on the size and complexity of the project.
• DevOps model: The DevOps approach to software development emphasizes collaboration between developers and operations teams throughout the entire software development lifecycle (SDLC). This results in faster delivery of working code increments, as well as higher quality products overall.

All About the V-Shaped Model

The V-Shaped model is a waterfall model that is often used in large projects. It is called "V-Shaped" because the project goes through the following phases:

1. Requirements gathering and analysis
2. Design
3. Coding and unit testing
4. Integration and system testing
5. User acceptance testing
6. Deployment and maintenance

Advantages of the V-shaped Model:

• The main advantage of the V-Shaped model is that it is very well-defined and structured. This makes it easy to manage large projects because each phase has specific deliverables that need to be met. This also means that risks are easy to identify and address early on in the project.
• Another advantage of the V-Shaped model is that it allows for parallel development. For example, while the coding phase is going on, user acceptance testing can be done at the same time. This can help speed up the overall project timeline.

Disadvantages of the V-shaped Model:

• However, there are also some disadvantages to using the V-Shaped model. Firstly, it can be quite rigid. Once a phase has started, it can be difficult to make changes without affecting other parts of the project timeline. This can be a problem if new information or requirements arise during the course of the project.
• In this model, early prototyping is not possible as the software is developed during the implementation phase.

The Agile Software Model 

Agile development streamlines the software development process in the best possible way. It divides the project into phases, and each phase has specific tasks that need to be completed. The goal of the model is to achieve continuous improvement in the product's quality. 

Most organizations today use the agile development life cycle model, and it has proven to be successful. By following the model, development teams are able to achieve faster project delivery and quality assurance.

Advantages of the Agile Software Model:

• The agile development life cycle model is a flexible and efficient way to develop software.
• It allows for constant change and feedback, which leads to better products.
• The cycle is also easy to adopt and use in your own projects.

Disadvantages of the Agile Software Model:

• The agile development life cycle model is a software development process that is heavily reliant on feedback and collaboration between teams. However, this model has several disadvantages, including the need for frequent changes to be made to the product codebase. This can make it burdensome to maintain the original vision of the product and keep up with customer needs. 
• Additionally, any changes made in one area of the product may have unintended consequences in other areas of the system. As a result, the agile development life cycle model may not be the best method for all projects. 

Making the Decision

There are pros and cons to both models. 

The agile model is known for its flexibility and responsiveness to change. This makes it ideal for projects that are constantly evolving or that require quick turnarounds. However, this flexibility can also be a downside, as it can lead to scope creep and unrealistic expectations.

The V-shaped model is more rigid and structured, but this can also be seen as a strength. This model helps to prevent scope creep by clearly defining the deliverables at each stage of the project. It also provides more structure and transparency, which can help to keep stakeholders informed and on track. However, the downside of this model is that it can be inflexible and resistant to change.

So, which model is best for your project? Ultimately, it depends on your specific needs and objectives. 

The Agile software development life cycle model is a great choice for small to medium-sized projects. This is because it offers flexibility and adaptability, which are essential when working on smaller-scale projects. So if you need a flexible and responsive approach, then the agile model may be a better fit. 

While the V-Shaped model is better suited for larger projects where there is more of a need for structure and discipline. Whichever model you choose, make sure it fits the specific needs of your project. And if you need a more structured and predictable approach, then the V-shaped model may be a better option.