Terminology

991 terms, tools, patterns and metrics an architect is expected to use precisely. Each one gets a short explanation of what it is, and — where it matters — what it is commonly confused with. Search filters as you type; the column headers sort.

All areas991 Architecture Fundamentals38 Distributed Systems73 Data Architecture71 Cloud Architecture55 Networking51 API & Integration Architecture45 Reliability & Resilience40 Observability33 Performance & Capacity Engineering34 Security Architecture50 Cost Architecture & FinOps30 Business Architecture28 Architecture Communication27 Enterprise Architecture27 Legacy Modernization27 AI-Era Architecture34 Software Architecture & Engineering37 Architecture Patterns34 Architecture Decision-Making30 The Architect's Meta-Skills27 Delivery & Release Engineering20 Platform Engineering & Developer Experience20 Testing & Quality Architecture20 Data Platform Architecture20 Streaming & Real-Time Data20 Data Governance & Semantics20 Frontend & Experience Architecture20 Edge, Mobile & IoT20 Regulatory & Data Protection Architecture20 Assurance, Audit & Model Risk20

Kind Any concept379 practice294 pattern166 metric55 tool36 protocol35 case-study26

7 terms shown.

Term	Kind	Topic	What it is
Automation Bias	concept	Human-in-the-Loop Design	The tendency of a human reviewer to accept a system's output rather than evaluate it, which is what turns human oversight into a rubber stamp.
Certification Scope Boundary	concept	Certification Impact on Architecture	The declared set of systems, locations and people a certification covers, which determines both its cost and what it actually tells a customer.
Fairness Definition Choice	concept	Bias & Fairness Controls	Selecting which mathematical fairness criterion applies, given that the main criteria are provably incompatible and the choice is a value judgement.
Independent Assurance	concept	Three Lines Model	Assessment by a function with no involvement in designing or operating the control, which is what makes the assessment worth anything.
Operating Effectiveness	concept	Control Design vs Operation	Whether a control actually ran, consistently, over a period — as distinct from whether it was well designed, and the harder of the two to demonstrate.
Risk Tolerance Statement	concept	Risk Appetite	The board-level declaration of how much of each risk type the organisation will accept, which is what tells an architect which risks may be accepted without escalation.
Toxic Combination	concept	Segregation of Duties	A pair of permissions that is acceptable individually and dangerous together, which is what a segregation-of-duties model exists to identify.