---
id: spiral
requestedLanguage: en
descriptionLanguage: en
---

# Spiral Development Model

- Type: lifecycle model
- Group: Lifecycle models
- Placement: Lifecycle models
- [Source](<https://www.sei.cmu.edu/documents/5439/2000_003_001_13655.pdf>)

[HTML](https://dpm.cnonim.name/practices/spiral/)

Key risks determine the next cycle: compare alternatives, reduce uncertainty, and refine the work ahead.

## Relationships

- defines cycles through: [Software Risk Management](/practices/risk/en.md) (support)
- may reduce uncertainty through: [Technical spike](/practices/spike/en.md) (support)
- may explore alternatives through: [Prototyping](/practices/prototype/en.md) (support)

[Show on the map](https://dpm.cnonim.name/#practice=spiral&lang=en)