Waterfall vs Agile vs DevOps SDLC Models

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

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

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.

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

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Waterfall vs Agile vs DevOps SDLC Models