Unified Gas Supply System (UGSS) is the production and technology complex consisting of production, transmission, processing and underground gas storage facilities.

Parameters optimization of gas pipeline systems which are being constructed since 1990 is performed at the level of process interaction of all the gas pipelines of a single corridor. A joint operating regime of compressor shops makes it possible to use compression capacity efficiently. It also provides for reduction of the number of operational gas compressor units at some compressor stations (CS). Operational reliability of compressor shops is also increased, because the number of standby units decreases without reduction of compressor station reliability.

To ensure flowchart and structural reliability in the process of the UGSS development planning in aggregated indexes, flexibility and failure survival requirements were taken into account, i.e. its capability to stand against major disturbances caused, for instance, by a sharp drop in productivity of certain major gas trunklines.