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Every published pattern study, system study, bulletin and research note in one place. Search by word, or narrow the list by format, pattern or system.
Common starting points
I'm trying to understand a dependency pattern →The six foundational pattern studies.I work with a particular critical system →Choose a system below to see its study and the patterns it shows.I want the latest bulletin →Issue 04 · October 2026.20 of 20 items
- Research noteResearch Note R-001 · October 2026
When Taking Systems Offline Becomes the Safer Choice →
Precautionary disconnection during the October 2026 PHP vulnerabilities: what operators knew, what continuity they gave up, and why restoring a service can be as hard as stopping it.
Patterns: Dependency Concentration, Fragile Redundancy, Operational Complexity
- BulletinIssue 04 · October 2026
When Something Becomes Too Important to Lose →
How reliable systems change the behaviour around them, and why the consequences of losing a service can grow even when the service itself has not become less reliable.
Patterns: Dependency Concentration, Fragile Redundancy, Operational Complexity
- BulletinIssue 03 · September 2026
What Happens When a System Forgets? →
How critical systems can retain procedures and safeguards while gradually losing the knowledge of why they were introduced.
Patterns: Incident Memory
- BulletinIssue 02 · August 2026
When Redundancy Isn't Really Redundancy →
What happens when redundancy exists on paper but is weaker in practice: alternatives that look separate at the surface, yet converge on shared dependencies underneath.
Patterns: Dependency Concentration, Fragile Redundancy
- BulletinIssue 01 · July 2026
Complexity, Concentration, and Governance →
Three patterns that continue to appear across critical systems: complexity, concentration, and the challenge of governing change over time.
Patterns: Dependency Concentration, Governance Lag, Operational Complexity
- Pattern studyPattern 001
Dependency Concentration →
Why critical systems centralize, why alternatives disappear, and what risks and benefits emerge as a small number of operators come to carry an outsized share of essential functions.
All research on Dependency Concentration · observed in 8 system studies
- Pattern studyPattern 002
Fragile Redundancy →
Why backup systems quietly come to share their primaries' dependencies, why contingency plans decay between exercises, and why failovers fail at the moments they are most needed.
All research on Fragile Redundancy · observed in 9 system studies
- Pattern studyPattern 003
Governance Lag →
Why systems evolve faster than the institutions meant to oversee them, why governance tends to be reactive rather than anticipatory, and which consequences recur across very different domains.
All research on Governance Lag · observed in 9 system studies
- Pattern studyPattern 004
Deferred Maintenance →
Why reliable systems become invisible, why renewal is repeatedly postponed, how structural debt compounds, and what governance can do to keep upkeep visible.
All research on Deferred Maintenance · observed in 6 system studies
- Pattern studyPattern 005
Operational Complexity →
How complexity accumulates through incremental decisions, why operator comprehension gradually outpaces system growth, what happens under stress, and what reversibility looks like.
All research on Operational Complexity · observed in 8 system studies
- Pattern studyPattern 006
Incident Memory →
How institutions lose or distort the lessons of past failures, what happens when memory fails, and what durable incident memory looks like when it is embedded in practice rather than paper.
All research on Incident Memory · observed in 9 system studies
- System study
Electrical Grids →
Continuous balancing of generation, transmission, and demand across interconnected networks that tolerate almost no interruption.
Patterns: Dependency Concentration, Fragile Redundancy, Governance Lag, Deferred Maintenance, Operational Complexity, Incident Memory
- System study
Water Infrastructure →
Treatment, distribution, and wastewater systems whose continuous operation is a precondition for public health and urban life.
Patterns: Dependency Concentration, Fragile Redundancy, Governance Lag, Deferred Maintenance, Operational Complexity, Incident Memory
- System study
Rail Networks →
Long-lived physical and signalling assets that move people and freight at scales no alternative mode can absorb quickly.
Patterns: Dependency Concentration, Fragile Redundancy, Governance Lag, Deferred Maintenance, Operational Complexity, Incident Memory
- System study
Payment Infrastructure →
Clearing, settlement, and card networks that quietly underwrite the daily functioning of commerce and household life.
Patterns: Dependency Concentration, Fragile Redundancy, Governance Lag, Operational Complexity, Incident Memory
- System study
Air Traffic Control →
Coordinated airspace management where reliability, redundancy, and human judgement are tightly interwoven and consequential.
Patterns: Fragile Redundancy, Governance Lag, Operational Complexity, Incident Memory
- System study
Internet Backbone →
The aggregation, routing, and interconnection layer beneath nearly every digital service used by governments, firms, and individuals.
Patterns: Dependency Concentration, Fragile Redundancy, Governance Lag, Operational Complexity, Incident Memory
- System study
Submarine Cables →
The physical fibre running across oceans that carries the overwhelming majority of intercontinental data traffic.
Patterns: Dependency Concentration, Fragile Redundancy, Governance Lag, Deferred Maintenance, Incident Memory
- System study
Telecommunications Networks →
Fixed and mobile networks that act as the connective tissue for emergency response, commerce, and civic participation.
Patterns: Dependency Concentration, Fragile Redundancy, Governance Lag, Deferred Maintenance, Operational Complexity, Incident Memory
- System study
Ports and Logistics Systems →
Maritime gateways and inland distribution networks whose throughput determines the resilience of supply across entire regions.
Patterns: Dependency Concentration, Fragile Redundancy, Governance Lag, Deferred Maintenance, Operational Complexity, Incident Memory