DevOps (development and operations) is an enterprise software development phrase used to mean a type of agile relationship between Development and IT Operations. The goal of DevOps is to change and improve the relationship by advocating better communication and collaboration between the two business units.
The DevOps culture puts a focus on creating a fast and stable work flow through development and IT operations. One main goal of DevOps is to deploy features into production quickly and to detect and correct problems when they occur, without disrupting other services.
DevOps is not based on stringent methodologies and processes: it is based on professional principles that help business units collaborate inside the enterprise and break down the traditional silos. The guiding principles of DevOps include culture, measurement, automation and sharing.
DevOps is considered to be a new approach to the more traditional application lifecycle management (ALM) process.