LOW KAH YIENGINEER & SYSTEMS THINKER
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Low Kah YiEngineering leadership · Singapore

Reliable systems.
Through change.

I lead engineering teams that keep control systems and digital infrastructure running through change. Here I write about reliability and build small models of how systems fail and recover.

Nine years in 24/7 operations · Controls · Modernization · Recovery
Independent experiments in power, cooling and recovery.

ONE PLANT · POWER · COOLING WATERSynthetic model
Supply AunavailableSupply BavailableBus AunavailableBus BavailableDuty pumpunavailableStandby pumpunavailableCooling loopavailableVesselavailable

Bus A loses power. The standby pump is started automatically, on the same dead bus.

Cooling water
0%
Pressure at 120 s
339 kPa
Outcome
Trip at 276 s
Follow the full sequence →

START HERE · THREE NOTES

  1. Count redundancy by what it survives.

    How I judge a redundant design: by the events it can absorb.

  2. Changing a system that cannot stop.

    How I plan work on a live system: stop points, a recoverable state and evidence.

  3. Recovery is a sequence, not a switch.

    Why “back online” and “recovered” are different claims.

01 / PRACTICE

Decisions with operational consequences.

All selected work →

02 / LATEST NOTE

Follow one fault across every boundary.

Design reviews split a plant by discipline; faults do not. One synthetic unit shows a redundancy in one discipline defeated through another.

22 October 2026 · 3 min read

CRITICAL SYSTEMS LAB

Four experiments in capacity, resilience, alarms and feedback, and one plant that joins them.

Explore the lab →

03 / A LITTLE CONTEXT

From chemical engineering at NUS to computer science at Georgia Tech, and from hands-on control systems work to leading engineers. Outside work: running and triathlon.

QUESTIONS AND CORRECTIONS

Disagree with something?
Tell me.

I write these notes and build these models to think more clearly. Questions, corrections and different views are welcome at low@kahyi.com.

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