169 lines
5.7 KiB
Plaintext
169 lines
5.7 KiB
Plaintext
---
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title: 8. Architecture Change Management
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description: Process for evaluating and managing future architectural change in LUNA Charts, ensuring the system evolves without losing consistency.
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sidebar:
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order: 9
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---
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## 1. Overview
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Architecture Change Management defines how LUNA Charts adapts to new requirements, technologies, standards, and stakeholder needs throughout its lifecycle.
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Rather than treating the architecture as a static artifact, this phase establishes a controlled evolution process that preserves architectural consistency while enabling continuous improvement.
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All architectural changes follow documented governance processes and remain aligned with the project's long-term vision and architectural principles.
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## 2. Objectives
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Architecture Change Management pursues the following objectives:
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- Ensure the long-term sustainability of the architecture
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- Adapt to technological and regulatory changes
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- Preserve architectural consistency across releases
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- Support controlled innovation without compromising existing principles
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- Maintain traceable architectural evolution
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## 3. Architecture Change Triggers
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Architectural changes may be initiated by various internal and external factors.
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Typical triggers include:
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### External Triggers
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- Updates to WCAG recommendations
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- Changes in accessibility regulations
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- Browser platform evolution
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- SVG specification changes
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- TypeScript language evolution
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- New web platform capabilities
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### Internal Triggers
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- Architectural improvements
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- Lessons learned during implementation
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- Long-term maintainability concerns
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- Performance improvements
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- Community feedback
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- New functional requirements
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The existence of a trigger does not automatically require an architectural change. Every trigger must first be evaluated.
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## 4. Change Evaluation
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Every proposed architectural change is evaluated before implementation begins.
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Evaluation includes questions such as:
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- Does the proposal align with the Architecture Vision?
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- Does it respect the established architecture principles?
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- Does it improve long-term maintainability?
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- Does it preserve accessibility objectives?
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- Does it maintain a positive developer experience?
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- Does the expected value justify the architectural impact?
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Architectural principles always take precedence over feature demand.
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New functionality should strengthen the existing architecture rather than weaken its consistency.
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## 5. Architecture Evolution Process
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Architectural evolution follows a structured review process.
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```text
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Change Trigger
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↓
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Architecture Evaluation
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↓
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Architecture Discussion
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↓
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Maintainer Decision
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↓
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Architecture Documentation Update
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↓
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Implementation
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↓
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Project Documentation Update
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↓
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Release
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```
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Implementation follows documented architectural decisions rather than defining them.
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## 6. Documentation Management
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Architecture documentation is the primary source of truth for architectural decisions.
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Whenever an architectural change is approved, the following artifacts should be reviewed and updated where applicable:
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- Architecture documentation (ADM phases)
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- Developer documentation
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- Usage examples
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- Test suites
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- Public Change Log
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Documentation updates should precede or accompany implementation to ensure architectural transparency.
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## 7. Continuous Improvement
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LUNA Charts is designed to evolve continuously through incremental architectural improvements.
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Continuous improvement includes:
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- Refining existing architectural decisions
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- Improving accessibility support
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- Simplifying developer experience
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- Enhancing maintainability
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- Responding to technological evolution
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Continuous evolution should preserve the project's architectural identity.
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## 8. Major Architectural Evolution
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Some changes may fundamentally affect the architecture.
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Examples include:
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- Replacing core rendering technologies
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- Redefining the public API model
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- Introducing a new architectural paradigm
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- Fundamental changes to supported platforms
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Such changes should be treated as major architectural revisions and may require a new major software version.
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Major architectural evolution should be carefully evaluated before implementation begins.
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## 9. Relationship to Previous Phases
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Architecture Change Management builds upon all previous ADM phases.
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- Architecture Vision defines the long-term direction.
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- Business Architecture defines the expected business value.
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- Information Systems Architecture defines the application structure.
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- Technology Architecture defines the technical implementation.
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- Opportunities & Solutions defines the implementation roadmap.
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- Migration Planning defines delivery planning.
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- Implementation Governance ensures architectural compliance during implementation.
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Architecture Change Management ensures that future architectural evolution remains aligned with these foundations.
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## 10. Key Outcome of this Phase
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Architecture Change Management establishes:
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- A structured process for architectural evolution
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- Clear architecture change triggers
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- Evaluation criteria for architectural decisions
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- Documentation-first architecture evolution
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- Continuous architectural improvement
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- Controlled management of major architectural revisions
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The result is an architecture that remains stable, maintainable, and adaptable throughout the lifecycle of LUNA Charts.
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## 11. Change Log
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No structural changes were introduced in this document during this iteration.
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This phase concludes the Architecture Development Method (ADM) lifecycle by defining how architectural evolution is managed after implementation.
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The Architecture Change Management process complements the governance model established in Implementation Governance (Phase G) and provides the long-term evolution strategy for LUNA Charts. |