This document describes the Data Flow system operations model for VLT/VLTI instrumentation. It details the framework, responsibilities, dependencies and development breakdown within the Data Management Division and in relation with the VLT Division and Instrumentation Division, for the development and operation of the instrument dependent components of the Data Flow system. It analyzes in particular the process of production and operation of the pipelines, quality control, and instrument models, in order to guarantee the quantitative predictability and performance control of the instrumentation during the operations of the observatory.
The document has been written in collaboration with the members of the Data Flow Project Team and the Instrumentation Division.