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

5 terms shown.

Term	Kind	Topic	What it is
Break-Glass Change Ratio Emergency Change Rate, Bypass Ratio	metric	Change Advisory vs Automated Gates	The share of production changes that took the emergency path instead of the gated one, which measures how much of the change population a control actually covers.
Change Risk Budget Material Incident Budget, Change Risk Allowance	metric	Risk Appetite	A stated ceiling on material customer-visible incidents per period, converted into the change failure rate and escape rate engineering must design for - a conversion that usually shows blast radius and revert …
Evaluation Gate Coverage Gate Scope Ratio, Release Evaluation Coverage	metric	Model Evaluation & Red-Teaming	The share of a feature's real failure surface that its release evaluation actually exercises, which determines whether a passed gate is evidence of safety or evidence that the suite is stale.
Reviewer Throughput Ceiling Oversight Capacity Limit, Review Time Budget	metric	Human-in-the-Loop Design	The number of items a human reviewer can genuinely assess per hour, which bounds what any human-in-the-loop control can actually deliver regardless of what the design document claims.
Sampling Risk Detection Probability, Audit Sampling Power	metric	Continuous Controls Monitoring	The probability that a sample-based control test misses a violation that exists in the population - which for small samples and rare violations is most of the time.