# exhaustion (capacity)

maintaining a parameter outside its performance window while still inside its existence window.

- Computed level: L15 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: window  ·  Arena: system

## Emergence
**Emerges from:** [window](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-window.range), [wall](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-wall.range-end), [parameter](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-parameter.condition), [maintenance](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-maintenance.upkeep), [existence](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-existence.state), [inside](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-inside.spatial), [outside](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-outside.spatial), [performance](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-performance.quality), [still](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-still.quiet), [time](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-time.dimension)

**Through:** These components collectively sustain a condition where a system continues to exist despite operating beyond its optimal functional range, by actively preserving it within viable limits.

**Novel properties:**
- endurance beyond optimal function
- persistent viability under strain
- maintenance of existence amid degradation

## Examples
- The International Space Station maintains orbit at 400 km despite atmospheric drag requiring regular reboosts. *(engineering)*
- The 2021 Suez Canal blockage stranded container ships, each burning fuel to stay positioned against currents. *(economics)*
- Neurons in the human visual cortex fire continuously during prolonged focus, depleting local glucose reserves. *(biology)*

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-exhaustion.capacity*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-exhaustion.capacity.json*  
*Every definition provably resolves to space, time, energy and pattern.*