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Self-sustainability

A system is self-sustaining (or self-sufficient) if it can maintain itself by independent effort. The system self-sustainability is:

  1. the degree at which the system can sustain itself without external support
  2. the fraction of time in which the system is self-sustaining

Self-sustainability is considered one of the "ilities" and is closely related to sustainability and availability. In the economics literature, a system that has the quality of being self-sustaining is also referred to as an autarky.