What is DevOps?
DevOps is a set of cultural practices that encourages development and operations teams to share responsibility. It is not a single tool, product or job title. Its aims include reliable delivery, early detection of problems and bringing user feedback into development.
Collaboration and automation
In a traditional separation, one team builds software while another tries to keep it running. DevOps encourages performance, reliability and deployment needs to be addressed during development. Source code, configuration and infrastructure definitions can be versioned, while repeated testing and deployment steps can be automated. Small, frequent changes make it easier to identify which change caused a problem. Automation alone does not demonstrate quality, however: it can also spread an incorrect configuration faster. Code review, testing and post-deployment monitoring should work together. A rollback or forward-fix plan determines what happens when a release fails.
Evaluating success
DevOps success is not measured only by the number of daily releases. Time to deliver changes, failure rates, recovery time and user experience should be considered together. After production incidents, examining the conditions that allowed failure rather than searching for someone to blame supports learning. Early security involvement, access controls and dependency scanning can also be integrated into the process. A small team can start with a simple test pipeline and clear responsibilities. The same toolset does not suit every organization. Practices should reflect team size, change risk and the service's tolerance for disruption.