6.3.3 Test Using: Spreadsheets And Databases

Later, at the post-mortem, the director asked Aris why he hadn’t trusted the automated diagnostics.

“Exactly,” Aris said. “No hidden macros. No black-box AI filters. Raw truth.” 6.3.3 test using spreadsheets and databases

Then came the anomaly.

Meanwhile, Aris himself took the . It felt almost quaint. He exported a raw, unsanitized CSV of the suspect buoy’s last 10,000 readings into a blank Excel workbook. No pivot tables. No charts at first. Just rows and rows of floating-point numbers. Later, at the post-mortem, the director asked Aris

“No ghost,” Aris said quietly. “Something real just happened out there. Something fast.” No black-box AI filters

Then he built a simple linear regression trendline on a scatter plot. The previous three years were a gentle, predictable slope. The last six hours were a sheer vertical drop. He added a second sheet—a manual audit log—and typed step by step: 6.3.3 test using spreadsheets and databases. Result: Verified anomaly. No procedural errors.