Continuous Deployment can offer a competitive advantage and reduce the time-to-market. Purely software-centered companies often already employ Continuous Deployment but diversified corporations find it difficult to adopt this methodology. Too often, the software release process is painful and therefore done rarely. The project presented in this paper is aimed at helping companies with different software engineering domains to optimize their software release processes through Continuous Deployment. We propose a maturity model for measuring and improving the process maturity. It was developed and validated within Robert Bosch GmbH. Existing Continuous Delivery maturity models were analyzed and evaluated against a set of criteria established in our research. It was found that separating the levels Continuous Integration, Continuous Delivery and Continuous Deployment is essential for the support of agile development processes, as they build on one another. As this separation is not part of existing models, this dimension was used as the foundation to the newly developed Maturity Model Continuous Deployment – MMCD. It consists of a universal capability model and a detailed checklist with concrete points to fulfill each maturity level. Additionally, a check-tool was developed to generate a meaningful visualization of the assessment results and track the progress of improving maturity.