A system and method for controlling deployment of one or more changes to one or more applications of a computer system based upon an application reliability analysis. The system collects information related to one or more applications deployed on a system which require changes from one or more resources; generates a change risk score for each application based at least in part on a weighted average of one or more parameters affecting system quality, a weighted average of one or more parameters affecting system performance, and a weighted average of one or more parameters affecting system stability, and determines whether to perform an automated deployment process or prevent the deployment of application changes for each application.