I am sure most of the readers would have come across situations where suddenly applications stop working. Servers containing application crash due to hardware failure, environment changes on servers which make applications unusable, and when IT administrators are trying to fix the problem using a trial and error strategy. There have been situations where a new environment needs to be built for applications and services but there is no automated way to provision them. The entire environments are built manually. The Operations teams have sleepless nights because they might have missed steps while building the environment manually. There is even the possibility of a wrong configuration being applied. It might be that documentation and automation scripts exist but still there is no way to have a high level of confidence, predictability, and consistency in deployment.
If you and your team have experienced such situations, DevOps with its configuration management principles...