# regulation (control)

maintenance driven by feedback rather than by a fixed schedule.

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

## Emergence
**Emerges from:** [maintenance](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-maintenance.upkeep), [feedback](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-feedback.communication), [schedule](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-schedule.time)

**Through:** Feedback guides ongoing upkeep, replacing time-based planning as the driver of maintenance.

**Novel properties:**
- feedback-driven timing
- adaptive persistence
- schedule-independent control

## Examples
- The human body regulates blood glucose levels using insulin and glucagon in response to measured concentrations. *(biology)*
- The Therac-25 radiation therapy machine overrode safety limits when software ignored hardware feedback signals. *(engineering)*
- The Federal Reserve adjusts interest rates based on inflation and employment data from monthly reports. *(economics)*

## Used by
- [homeostasis](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-homeostasis.regulation) (L16)

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