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ArchitectMind

Stage 3 · Systems · 8 volumes · 235 topics

Book 8: Architecture Quality Attributes

The qualities architects are judged on: performance, scalability, availability, security, maintainability, operability and trade-offs.

The first three topics of every volume are live. New topics are added in rounds across all volumes, so the whole path grows evenly.

Volume I

Quality Attributes & Architectural Thinking

1.1 Quality AttributesThe measurable "how well" that shapes every architecture 1.2 Why Quality Attributes MatterDrivers, constraints, trade-offs and business impact 1.3 Quality Attribute CategoriesEleven core attributes — what each means, how to measure it, how to achieve it

Volume II

Performance & Capacity

1.1 PerformanceLatency · throughput · response time 1.2 Latency ComponentsNetwork · CPU · database · serialization · queueing 1.3 Tail Latencyp50 · p90 · p95 · p99 · p99.9

Volume III

Scalability & Elasticity

1.1 ScalabilityDefinition · scaling dimensions 1.2 Vertical ScalingCPU · memory 1.3 Horizontal ScalingMore instances · load balancing

Volume IV

Availability, Reliability & Resilience

1.1 Availability FundamentalsUptime · downtime 1.2 Availability Calculation99% · 99.9% · 99.99% · 99.999%1.3 Nines of AvailabilityWhat each nine demands — architecture, operations and cost

Volume V

Security, Privacy & Compliance

1.1 Security RequirementsConfidentiality · integrity · availability 1.2 Security ArchitectureTrust boundaries · attack surfaces 1.3 Threat ModelingAssets · threats · vulnerabilities · mitigations

Volume VI

Maintainability, Modifiability & Testability

1.1 MaintainabilityUnderstand it, diagnose it, correct it — quickly and safely 1.2 Technical DebtShortcuts that charge interest on every future change 1.3 Code QualityReadable, simple, correct and consistent code

Volume VII

Operability, Observability & Deployability

1.1 What Is Operability?Running, monitoring, diagnosing and recovering — cheaply and safely 1.2 Operational ReadinessRunbooks, alerts and dashboards that work at 3 a.m.1.3 Production Readiness ChecklistA tiered, evidence-based gate — and a living scorecard after launch

Volume VIII

Quality Attribute Trade-offs & Architecture Evaluation

1.1 Why Evaluate Architecture?Validate requirements, identify risks, compare alternatives 1.2 Architecture Evaluation MethodsScenarios, checklists, metrics and models 1.3 ATAMArchitecture Tradeoff Analysis Method