Explain SDLC with an example

 The Software Development Life Cycle (SDLC) refers to a methodology with clearly defined processes for creating high-quality software. in detail, the SDLC methodology focuses on the following phases of software development:

• Requirement analysis

• Planning

• Software design such as architectural design

• Software development

• Testing

• Deployment

How can DevSecOps be integrated into SDLC?

By following some best practices, DevSecOps can be integrated into SDLC in various ways.

• Planning and Requirement Analysis: Here, security requirements and appropriate security choices that can mitigate potential threats and vulnerabilities are identified in this stage. What security design principles and best practices to be used are also thought about here.
• Architectural Design: The development team uses the security design principle and architecture to consider potential risks. This stage involves threat modelling, access control, encryption mechanism, and architecture risk analysis.
• Software Development and Testing: The code reviews are done to ensure software follows code standards and security controls are implemented. Security vulnerability tests like penetration testing are also done to identify potential issues.
• Deployment: Automated DevSecOps tools are used to improve application security. To ensure the software is deployed securely, firewalls, access controls, and security settings are configured.
• Maintenance: Security continues after deployment. The team must continuously monitor the software for security vulnerabilities. The team would also update the software with security patches and updates as necessary.

Examples

The most common SDLC examples or SDLC models are listed below.

Waterfall Model

This SDLC model is the oldest and most straightforward. With this methodology, we finish one phase and then start the next. Each phase has its own mini-plan and each phase “waterfalls” into the next. The biggest drawback of this model is that small details left incomplete can hold up the entire process.

Agile Model

The Agile SDLC model separates the product into cycles and delivers a working product very quickly. This methodology produces a succession of releases. Testing of each release feeds back info that’s incorporated into the next version. According to the Robert Half, the drawback of this model is that the heavy emphasis on customer interaction can lead the project in the wrong direction in some cases.

Iterative Model

This SDLC model emphasizes repetition. Developers create a version very quickly and for relatively little cost, then test and improve it through rapid and successive versions. One big disadvantage here is that it can eat up resources fast if left unchecked.

V-Shaped Model

An extension of the waterfall model, this SDLC methodology tests at each stage of development. As with waterfall, this process can run into roadblocks.

Big Bang Model

This high-risk SDLC model throws most of its resources at development and works best for small projects. It lacks the thorough requirements definition stage of the other methods.

Spiral Model

The most flexible of the SDLC models, the spiral model is similar to the iterative model in its emphasis on repetition. The spiral model goes through the planning, design, build and test phases over and over, with gradual improvements at each pass.