Standard : Systems are architected to minimise the cost of change
Purpose and Strategic Importance
This standard ensures systems are architected with modularity and adaptability in mind, enabling teams to make changes safely, quickly, and with minimal disruption. It promotes long-term agility and reduces the hidden cost of architectural debt.
Aligned to our "Architect for Change" policy, this standard supports scalable design, faster iteration, and technical resilience. Without it, change becomes costly, fragile, and a blocker to innovation.
Strategic Impact
- Improved delivery flow and reduced risk
- Higher system resilience and technical agility
- Faster time to value through scalable architecture
- Stronger alignment to evolving business needs
Risks of Not Having This Standard
- Reduced ability to respond to change or failure
- Accumulation of technical debt or friction
- Poor developer experience and morale
- Decreased confidence in releases and features
- Misalignment between technical implementation and business priorities
CMMI Maturity Model
Level 1 – Initial
| Category |
Description |
| People & Culture |
Architecture decisions are ad hoc, with little consideration of change cost. |
| Process & Governance |
No defined architectural guidelines or practices to support change. |
| Technology & Tools |
Systems are tightly coupled, impeding rapid change. |
| Measurement & Metrics |
No measurement of architecture impact on delivery or change lead time. |
Level 2 – Managed
| Category |
Description |
| People & Culture |
Awareness of change cost exists but practices vary across teams. |
| Process & Governance |
Some architectural principles are documented and partially followed. |
| Technology & Tools |
Modular components exist but integration may be fragile or inconsistent. |
| Measurement & Metrics |
Informal tracking of architecture-related rework or delays. |
Level 3 – Defined
| Category |
Description |
| People & Culture |
Teams adopt modular design principles and document architectural decisions. |
| Process & Governance |
Architecture reviews and guidelines are established and consistently applied. |
| Technology & Tools |
Tools support modularity, versioning, and automated impact analysis. |
| Measurement & Metrics |
Metrics on change lead time and architectural debt are regularly monitored. |
Level 4 – Quantitatively Managed
| Category |
Description |
| People & Culture |
Architecture is managed proactively with focus on minimizing change effort. |
| Process & Governance |
Data-driven architectural decision-making supports continuous improvement. |
| Technology & Tools |
Automated analysis tools quantify architecture impact on delivery velocity. |
| Measurement & Metrics |
Trends in change lead time and architectural effectiveness guide investments. |
Level 5 – Optimising
| Category |
Description |
| People & Culture |
Architecture evolves continuously informed by feedback and system metrics. |
| Process & Governance |
Agile architecture practices embedded in strategic and delivery processes. |
| Technology & Tools |
Predictive analytics and tooling guide architectural adaptations in real time. |
| Measurement & Metrics |
Architectural impact on business agility and delivery outcomes is optimised. |
Key Measures
- Adoption rates of modular architecture principles
- Impact of architecture on change lead time and delivery flow
- Reduction in architectural debt and rework
- Developer satisfaction related to system adaptability
- Alignment of architecture with business goals and priorities