# Parallel Environments

> The requirement that two full production-equivalent environments run side by side for cutover.

Record: `lexicon:parallel-environments`
Kind: constraint
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-parallel-environments

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Low-Risk Cutover](https://banes-lab.com/records/lexicon/low-risk-cutover.md) and before [Controlled Exposure](https://banes-lab.com/records/lexicon/controlled-exposure.md).

## Category

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/records/lexicon-category/self-healing-recovery-deployment-safety.md)

## Required by

- [Blue-Green Deployment](https://banes-lab.com/records/architecture/blue-green-deployment.md)

## Linked from

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/ontology/principles/architecture-category-self-healing-recovery-deployment-safety.md)