Abstract
In recent years, the term DevOps, which means collaboration between the development and operations departments, has become an IT trend. However, although DevOps is now a success story as a concept, documented case report are not yet available. In this paper, I examine the definition of nonfunctional requirements as an example of the collaboration between both departments. This study's hypotheses is "Collaboration between the development department and the operations department can reduce system failures due to inadequacy of nonfunctional requirements by the development department." This hypothesis is supported by analysis results. Specifically, I considered the case of Tokio Marine & Nichido Systems and analyzed the collaborative relationship between both departments and system failure in detail. Further, I find that the operations department's deep involvement constitutes a major success determinant.
