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Patch Release (Low Severity)

Definition: Minor updates, typically involving bug fixes and small enhancements that do not impact the existing functionality significantly.

Characteristics:

No new major features.

No breaking changes.

Does not require user intervention.

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Minor Release (Moderate Severity)

Definition: Introduces new features or significant improvements to existing features, but does not fundamentally change the product.

Characteristics:

May include new features, enhancements, and performance improvements.

Backward compatible; no breaking changes to existing APIs or core functionality.

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Major Release (High Severity)

Definition: Major changes that might include new features, substantial revisions, or updates that significantly modify the product’s functionality.

Characteristics:

Introduction of significant new features or major changes to existing ones.

Possible backward incompatibilities or changes requiring user adaptation.

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Critical Release (Urgent Severity)

Definition: Emergency releases to fix critical bugs or security vulnerabilities. These releases are often unplanned but necessary for the smooth functioning and security of the product.

Characteristics:

Addresses critical bugs or security issues.

Requires immediate deployment to prevent potential data loss, security breaches, or significant system downtime.