It is a method of software testing which emphasizes on "availability" as opposed to "security". The term "devops" (as in "development-and debugging") derives from the fact that most of the testing tasks are performed "behind the scenes" by a separate team. These tests are designed to allow the user to take advantage of the latest functional capabilities of an operating system, without requiring a full system upgrade.
As a simplified description of the process, units (or systems) of work is broken down into pieces, and these pieces are then placed or stored in some kind of temporary container. The software is then executed in a container in such a way that each piece of functionality is tested individually. Once all tests have been passed, the entire testing process is stopped and a summary report is given to the owner. This summary report talks about the overall results of the testing and provides a detailed list of the issues that cropped up over the course of the testing. It can also list problems encountered which were not considered during the testing phase and thus could have been resolved with an improvement in the code.
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