Advances in agile software development over the years have led to a demand for increased software velocity and throughput. DevOps provided the answer to these demands by bringing a holistic approach to the end-to-end software delivery lifecycle. More than merely a process or methodology, DevOps signifies a paradigm shift in software engineering with a core focus on agility, collaboration, and automation within IT and development team processes.
The traditional silo-based approach involved IT and development working independently within their own teams and processes, which led to frequent communication gaps, lack of alignment and subsequently production delays and software defects. DevOps bridges the gap between development and operational teams through collaboration, seamless engagement, and rigorous alignment with the goal of achieving faster and more efficient delivery while minimizing software defects.
In the Waterfall model, QA and testing tended to occur only at the very end of the software development lifecycle. As a result, much of the feedback and testing results were received too late to incorporate feedback into the software.
Using Agile, development teams frequently released software chunks to customers, regularly incorporating their feedback in the development. DevOps and the nascent Quality Engineering mindset has taken the Agile approach to the next level by focusing on total quality and improving the overall software development process itself.
In the DevOps universe, Quality exists at the fore and center of Development and Operations.