Architecture-First Engineering

Complex programmes are designed as layered systems before development begins. This page shows how structure, governance, and evolution are engineered from the foundation up.

01

Business & Operational Context

Clarifies mission objectives, service obligations, and operating model so the system reflects real-world duties.

HORIZON: 5–10 YRSOWNER: EXECUTIVE
02

System Requirements & Constraints

Translates intent into measurable requirements, policy constraints, and interoperability expectations.

BASELINE: APPROVEDOWNER: PMO
03

Core System Architecture

The structural blueprint: domains, interfaces, data flows, and change boundaries that govern all subsequent work.

STATUS: FIXEDROLE: ARCHITECTURAL BASELINE
04

Security & Governance

Identity, access, audit, and regulatory controls embedded across every architectural decision.

FRAMEWORKS: ISO, NISTOWNER: RISK & SECURITY
05

Performance & Reliability Design

Designs for capacity, resilience, observability, and operational response before load is introduced.

TARGET: 99.99% SLAOWNER: SRE
06

Development & Implementation

Delivery teams implement against the architectural contract, with code changes feeding the evolution loop.

MODE: INCREMENTALOWNER: DELIVERY