Root Cause Analysis in Practice
Case Studies
Problems that looked unsolvable — until the right questions were asked. Each case illustrates the difference between treating symptoms and fixing causes.
Case Studies
Case 01 — VPN & Routing
The VPN That Randomly Broke — And Nobody Knew Why
Users disconnecting constantly, logs showing nothing. Vendor support found no fault. The real cause was a combination of asymmetric routing, MTU mismatches, and firewall session table behaviour.
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Case 02 — Network Performance
We Have Enough Bandwidth — So Why Is Everything Slow?
Low utilisation everywhere, yet applications lagged and users were frustrated. The problem wasn't capacity — it was structural: flat topology, broadcast chaos, and zero traffic prioritisation.
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Case 03 — Security Architecture
We Invested in Security — But Still Didn't Feel Secure
Firewall, endpoint protection, monitoring — all in place. But no segmentation, no trust zones, and one compromised endpoint could reach everything. Tools without architecture.
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Case 04 — Infrastructure Complexity
It Worked for Years — Until It Didn't
A growing company, infrastructure built through quick fixes and urgent responses. Random outages began appearing. Nothing had broken suddenly — complexity had accumulated silently over years.
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Case 05 — Intermittent Failures
The Issue That Only Appeared Under Load
Random latency spikes. Intermittent packet loss. Impossible to reproduce consistently. Standard monitoring showed nothing. The evidence only existed in brief moments that standard tooling never captured.
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