Voices: Rezabek

When real-time data that isn't real

Analysts must beware the strategies designers used to accommodate the limits of legacy systems.

By John Rezabek
Sep 12, 2019

Staring at data extracted from the site’s process historian, a cadre of process engineers, operations specialists and their big-data analyst were peering at the seconds leading up to a curious, sudden and unexplained reversal of flow that appeared to induce a surge or stonewall of their large feed compressor. They began seeing evidence of instances where flows and temperatures were ramping—increasing or decreasing steadily in the seconds leading up to the event—all scrutinized as possible precursors to the anomaly. Which was the first measurement to start deviating from the previous steady state?

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