Terminology

2240 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 areas2240 Architecture Fundamentals77 Distributed Systems107 Data Architecture110 Cloud Architecture94 Networking88 API & Integration Architecture82 Reliability & Resilience80 Observability75 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 Architecture71 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 concept806 practice738 pattern379 metric133 case-study77 tool62 protocol45

71 terms shown.

Term	Kind	Topic	What it is
Test Pyramid	pattern	Test Pyramid Shapes	The heuristic that a suite should hold many fast isolated tests, fewer integrated ones, and very few full end-to-end tests.
Test Quarantine Flaky Test Isolation	practice	Flaky Test Management	Removing an unreliable test from the blocking suite immediately, so it stops eroding trust, while keeping it running non-blocking until it is fixed or deleted.
Test Strategy Altitude	concept	Testing & Quality Architecture	Deciding which risks are verified at which level, so that each layer tests something the layers below it structurally cannot.
Test-Owned Data Data Created By The Test, Per-Test Tenancy	pattern	Test Data Management	Each test creating the exact data it needs through the product's own write path and disposing of it afterwards - replacing shared fixtures whose drift and coupling cause most cross-team test failures.
Testability Design for Test	concept	Testing & Quality Architecture	The architectural property that determines what kinds of test are possible - which decides the shape of the suite far more than any testing discipline does.
Testability as a Design Property	concept	Test Architecture Strategy	How cheaply a system's behaviour can be observed and controlled, which is decided by architecture and largely fixed before any test is written.
Testing in Production TIP	practice	Testing in Production	Deliberately validating behaviour against real traffic, data and scale, using controls that bound the blast radius.
Testing Trophy	concept	Test Pyramid Shapes	A distribution weighted towards integration tests rather than unit tests, appropriate where most of the risk lives at boundaries rather than in logic.
Traffic Shading Traffic Marking, Shadow Tagging, Request Tainting	pattern	Testing in Production	Marking a request as synthetic and propagating that mark through every hop so downstream services can route its writes to shadow storage and suppress its side effects, which is the single mechanism that makes …
Traffic-Mix Skew Canary Population Bias, Assignment Bias	concept	Testing in Production	A canary or experiment arm receiving a population that differs systematically from the baseline - so the comparison measures who was routed rather than what changed.
Vacuous Pass Assertion-Free Test, Empty-Set Pass, Silent Test	concept	Testing & Quality Architecture	A test that passes because it verified nothing rather than because the code is correct - an assertion that never ran, a loop over an empty collection, a mock that could not fail - which is worse than having no…