Your Data Lake is a Write-Only Memory

It's 2 AM when the alert hits: "Machine 47 running 15° above spec." The factory manager asks the obvious question: "Which other machines from this vendor are showing temperature anomalies?" The data team's response? "We have five years of sensor data! But it'll take two weeks to build a pipeline to query it." So instead of a query that should take seconds, they dispatch a technician. Cost: $50,000 for the truck roll, specialist time, and production downtime to inspect machines that might be fine