The Force Element Groups (FEGs) of the Australian Defence Force are the operational capabilities. Capabilities are formed into Force Elements (FE), which in turn are aggregated into Force Element Groups (FEG). Each capability is assigned a level of operational readiness. The level of capability maintained by an FE or FEG should be consistent with its assigned readiness notice and depends on the availability of trained personnel, the availability of major platforms, combat systems and supplies, and the standard of collective training.