Terminology

2225 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 areas2225 Architecture Fundamentals77 Distributed Systems107 Data Architecture110 Cloud Architecture94 Networking88 API & Integration Architecture82 Reliability & Resilience75 Observability70 Performance & Capacity Engineering72 Security Architecture86 Cost Architecture & FinOps71 Business Architecture67 Architecture Communication67 Enterprise Architecture66 Legacy Modernization71 AI-Era Architecture74 Software Architecture & Engineering71 Architecture Patterns71 Architecture Decision-Making63 The Architect's Meta-Skills61 Delivery & Release Engineering66 Platform Engineering & Developer Experience70 Testing & Quality Architecture66 Data Platform Architecture69 Streaming & Real-Time Data69 Data Governance & Semantics74 Frontend & Experience Architecture66 Edge, Mobile & IoT68 Regulatory & Data Protection Architecture65 Assurance, Audit & Model Risk69

Kind Any concept801 practice736 pattern377 metric127 case-study77 tool62 protocol45

4 terms shown.

Term	Kind	Topic	What it is
Control Design vs Operating Effectiveness	concept	Control Design vs Operation	The distinction between a control being correctly designed to address a risk and it actually having worked consistently over a period.
Fail-Closed Control Deny on Error, Safe-Failure Gate	practice	Control Design vs Operation	A control that blocks when it cannot evaluate, rather than allowing the action through - so that a broken control is visible immediately instead of silently ceasing to protect 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.
Silent Control Failure Dormant Control, Control Decay	concept	Control Design vs Operation	A control that has stopped operating while still reporting success, so the organisation keeps making decisions on the assumption that it is protecting them.