Process architectural characteristics describe where the software development process intersects with architecture. They reflect decisions that affect how easily the system can be built, tested, changed, and delivered.

  • Process architecture
  • Structural architecture
  • Operational architecture
  • Cross-cutting architecture

Process Architecture

Process architectural characteristics are where software development process intersects with software architect. They reflect with the decisions about the mechanics of building software.

  • Modularity - Split the system into small, well-defined parts so changes stay localized.
  • Testability - Make it easy to write and run tests so behavior can be verified quickly.
  • Agility - Enable fast, low-friction changes and iteration.
  • Deployability - Make releases simple, safe, and repeatable so updates can go out without drama.
  • Extensibility - Allow new capabilities to be added without rewriting core behavior.
  • Decouple-ability - Keep modules independent through clear interfaces, not internal dependencies.

Structural Architecture

This architecture Characteristics affect the internal software system, that includes factors like decoupling between components and the relationship between different integration points. What does that mean is that these characteristics are about the system’s inside wiring, how modules depend on each other, how data and calls flow between them, and how clean and stable the integration boundaries are.

  • Security - How secure the system is, holistically.
  • Extensibility - How easy the developers to extend the system.
  • Maintainability - How easy for the developers to make changes or add new features.
  • Portability - How is is to run the system to run more that one platform.
  • Localization - How well the system supports multiple languages.

Operational Architecture

Operational architecture characteristics represent how architectural decisions influence what operation team members can do. In other words how the system behaves in production and how easily the ops team can run it, monitor it, troubleshoot it, and recover when something goes wrong.

  • Availability - The system stays up and accessible when users need it.
  • Recoverability - The system can restore service and data quickly after failures.
  • Robustness - The system handles bad inputs, spikes, and partial failures without collapsing.
  • Performance - The system responds fast and uses resources efficiently under expected load.
  • Reliability / Safety - The system behaves correctly over time and avoids unsafe or harmful outcomes.
  • Scalability - The system can handle more users/work by adding resources without major redesign.

Cross-Cutting Architecture

Cross-cutting architectural characteristics are concerns that affect many parts of the system at once, not just one module or one layer—so they must be handled consistently across the whole application.

  • Security - Protect the system and data from threats and misuse.
  • Authentication / Authorization - Verify who a user is and control what they’re allowed to do.
  • Accessibility - Ensure people with disabilities can use the system effectively.
  • Legal - Follow applicable laws, regulations, and contractual obligations.
  • Privacy - Collect and handle personal data responsibly and minimize exposure.
  • Usability - Make the system easy to learn, navigate, and use without frustration.

If you’re designing a system today, try this: pick your top 3 architectural characteristics and write them down before you write any code. It’ll instantly clarify your decisions.