Reusability

Kind: quality-attribute

Layer: Structural Core

Record: architecture:reusability

Severity: recommended

Scope: function, module, component

Canonical: Ontology

The degree to which a function or module can serve a new caller without change, because it carries no context of its first one.

Listed in Architecture principles, after Composition Over Inheritance and before Replaceability.

Requires

• Abstraction
• Stable Contracts

Reinforces

• Do Not Repeat Yourself (DRY)
• Composability

Enables

• Shared Libraries
• Product Lines

Conflicts with

• Context-Specific Coupling

In tension with

• YAGNI
• Over-Generalization

Tensions

• Reusability / YAGNI
• Reusability / Over-Generalization

Violated by

• Context-Specific Coupling

Refactored by

• Introduce Parameter Object
• Extract Module
• Pass Context Explicitly

Severity

• recommended

Category

• Core Modular Design

Enabled by

• Single Responsibility Principle

Linked from

• Tools live in the tree
• Core Modular Design
• Core Modular Design
• Core Vocabulary
• Correctness / Determinism / Verification
• Severity levels
• The resolutions