Weakest link
All must work.
The single idea
Scale turns βrareβ into βroutineβ
A component with 99.9% reliability sounds excellent.
Redundancy
At least one path up.
Repair matters
High MTBF with long MTTR still means painful outages.
Fault propagation
One bad hop poisons downstream steps.
Interactive
Resilience Lab β redundancy math
Compare series vs parallel.
System reliability
99.50%
Series of 5 Γ 99.9% stages β one weak hop dominates.
Rsys = Rn
Fault propagation
Cascade simulator
A linear AI pipeline.
What you should see
Real systems patterns
Microservice chain
Ten services at 99.9%.
Multi-AZ redundancy
Parallel paths help until common-mode.
LLM agent pipeline
Hallucination at step 2.
On-call reality
MTTR dominates user pain.
Cross-domain transfer
Same law β different context
After the lab, map the model to your stack.
Components & derating
Chain of Rα΅’ blocks.
Watchdog & safe state
Task failure β safe mode.
Redundancy / TMR
Voting modules = parallel redundancy.
Microservice cascade
10 Γ 99.9% β 99% end-to-end.
Self-check