Pattern 20: Failure Mode and Cascade Patterns
Overview
Coordination structures contain failure modes where disruptions originate locally and propagate through dependency relationships. The shape and reach of these cascades depend on coupling and isolation characteristics.
Disruptions may remain localized or spread across dependent components. Small initial deviations may dissipate or amplify through tightly coupled pathways. Systems may include buffers or isolation points that interrupt propagation, or may allow rapid transmission across components. Failure pathways may be anticipated during design or emerge through operation.
These structural features appear where work, teams, or systems depend on one another—during routine operations, high-complexity conditions, tight coupling, and periods of system stress.
Observable Manifestations
Small disruptions escalating into broad system impact
Failures appearing sudden despite prior gradual degradation
Failure origins identified far upstream from visible breakdown
Single component breakdowns triggering dependent failures
Minor errors amplifying through dependency chains
Failures matching previously unidentified structural vulnerabilities
Tight coupling enabling rapid disruption propagation
Absent buffers at critical dependency junctions
Early coordination mismatches receiving low attention
Increasing dependency complexity without reassessment
Structural Conditions
Dependency relationships enabling disruption propagation
Coupling characteristics shaping propagation speed
Detection timing relative to propagation rates
Available buffer or redundancy capacity
System complexity limiting failure anticipation
Organizational memory of past disruptions
Authority enabling isolation or containment structures
Time horizons allowing amplification before detection
Boundaries
Not about individual error or carelessness
Not isolating this pattern from overlapping dynamics
Not implying poor design or organizational dysfunction
Not explaining why specific failure structures exist
Not evaluating optimal levels of coupling
Not determining appropriateness for specific risk tolerances
Common Misattributions
Attributed to single-point failure when cascades propagate
Attributed to individual error under tight coupling
Attributed to sudden onset despite prior degradation
Attributed to unpredictability when patterns repeat
Attributed to complexity when buffers are absent
Attributed to inattention during early normal variation
Attributed to bad luck when dependencies shape outcomes
The presence of this pattern does not imply poor resilience or required change. It describes observable failure propagation structures that exist across many functional and successful organizations. Both tightly coupled and loosely coupled systems persist in different contexts for structural reasons.