Reference Architecture

Create reference architecture and target state architecture diagrams showing standard patterns, building blocks, and future-state visions.

January 23, 2026

Reference architecture diagrams document standard patterns and building blocks that should be used across the organisation. Target state architecture diagrams show the desired future state.

Reference Architecture

A reference architecture provides:

Creating Reference Architecture Diagrams

Target State Architecture

Target state diagrams show the future vision:

Creating Target State Diagrams

Colour Coding for State

Colour	Meaning
Grey	Current state, no change
Green	New, to be implemented
Blue	Enhanced, to be modified
Orange	To be replaced
Red	To be retired
Dashed outline	Future, not yet implemented

Pattern Documentation

Document reusable patterns:

Best Practices

Keep Abstract

Reference architecture is guidance, not implementation.

Show Layers Clearly

Visual hierarchy matters.

Include Guidelines

Patterns without guidelines are incomplete.

Link to Examples

Connect to real implementations.

Version Control

Reference architectures evolve over time.

Get Buy-In

Reference architectures need governance.