Release
German: Freigabe oder Veröffentlichung In software development, release refers to the implementation of a product version with new released changes. There can be several releases until the finished product.
Release Management
German: Freigabe- oder Veröffentlichungsverfahren Release management comprises the planning and control of the publication of releases.
Requirements engineering
Requirements means requirements, engineering means to develop, construct, execute. Thus, requirements engineering is about capturing, specifying, and managing requirements for a system, product, or software.
DE 
EN