Waterfall vs Agile vs DevOps SDLC Models

Author: Abhay Reddy

SDLC models have evolved over the years to meet customer and industry needs. Below table illustrates some of the differences between the three key models

Image: Waterfall vs Agile vs DevOps SDLC Models

Waterfall Model (1970) provided a linear sequential approach to managing software projects. Each phase depends on deliverables from the previous one. The sequence includes Requirement, Design, Development, Test, Deploy, and Maintenance. This model dominated for more than 2 decades

Image: SDLC Waterfall Model.

Agile manifesto was created in 2001 and is now the most popular software development methodology. It is a highly dynamic and iterative approach where you do not need the complete set of requirements to start with. You can develop some features and check customer response before taking the next step. Large Scale Scrum (LeSS) and Scaled Agile Framework (SAFe) are some additional evolutions of agile methodology.

Image: SDLC Agile Methodology

DevOps (2009) is an Agile methodology encompassing Development (Dev) and Operations (Ops). It enables end-to-end lifecycle delivery of features, fixes, and updates at frequent intervals. Agile adoption inherently left the Operations department behind with deployments piling up faster than they could be released. This trend ultimately pushed the rise of DevOps

Image: SDLC DevOps

Alternate image: Animated

Image: Waterfall vs Agile vs DevOps SDLC Models

Keywords: Best SDLC model. What is the difference between waterfall vs Agile vs DevOps, What is CI/CD, SDLC trends, SDLC comparison, Popular SDLC models.

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