Major models of SDLC

Some of the commonly recognized models of Software Development Life Cycle (SDLC)are :

1.Waterfall Model:

• A linear sequential approach where each phase must be completed before the next one begins.

• Phases: Requirements, Design, Implementation, Testing, Deployment, Maintenance.

2.Spiral Model:

• Combines elements of both the waterfall model and iterative model.

• Emphasizes risk analysis and mitigation throughout the development process.

• Progresses through multiple cycles, each with its own planning, risk analysis, engineering, and evaluation phases.

3.V-Model (Verification and Validation Model):

• Extension of the waterfall model.

• Each phase in the development life cycle has a corresponding testing phase.

• Testing is emphasized at every stage of development.

4.Agile Model:

• Iterative and incremental approach to software development.
  Emphasizes collaboration, customer feedback, and flexibility.
  Iterative cycles are short, typically lasting 2-4 weeks, called sprints.

• Popular methodologies within Agile include Scrum, Kanban, and Extreme Programming (XP).

5.DevOps Model:

• Integration of development and operations teams to improve collaboration and automation.

• Emphasizes continuous integration, continuous delivery, and continuous deployment.

• Aims to shorten the development life cycle and provide faster and more reliable software releases.

6.Iterative Model:

• Development is divided into smaller, repeatable cycles, allowing for incremental improvements.

• Each iteration results in a working version of the software.