Five years ago, a regional freight rail network replaced its legacy mechanical track switches across all primary corridors with solid-state electronic switches. Laboratory testing and field trials established that these electronic switches have a mean time between component malfunctions four times longer than that of the legacy mechanical switches. Nevertheless, railway logs indicate that the total number of freight train delays caused by track-switch malfunctions across these corridors was substantially higher during the five years following the replacement than during the five years preceding it.
Which of the following, if true, most helps to resolve the apparent discrepancy described above?
- ALegacy mechanical track switches were especially susceptible to mechanical fatigue and gear binding during periods of extreme winter cold.
- BThe total volume of scheduled freight train traffic operating across these upgraded corridors decreased moderately during the five years following the switch installation.
- While a mechanical switch malfunction could be temporarily bypassed by train crews in minutes, an electronic switch fault automatically halts all corridor traffic until a specialized technician completes a full diagnostic reboot.Cevap
- DThe total capital acquisition and installation costs of the solid-state electronic switching systems exceeded original budgetary forecasts by over twenty-five percent.
- EAll train dispatchers and maintenance personnel across the regional network completed comprehensive retraining on the operating protocols of the electronic switches prior to installation.
Cevap
The statement explaining that electronic switch faults trigger automated corridor-wide shutdowns affecting multiple trains while mechanical faults could be bypassed quickly on-site resolves the paradox.
The correct answer provides an operational asymmetry: mechanical switch failures were localized and bypassed in minutes (delaying at most one train), whereas an electronic failure triggers an automated corridor lockdown that cascades across multiple scheduled trains. Consequently, even with a substantially lower malfunction rate, the multiplier effect of each incident produces a higher total number of delayed trains.
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Reconciling incident frequency with cascading impact in paradox resolution
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