James Vance••2 Technical Notes
The Experiment Had Three Factors but No Clear Response
Analysis of screening experiments where broad variance and unchecked background noise masked true factor sensitivity.
Curated Experimental Notes
Documented industrial investigations, root-cause diagnostics, and factor-level balancing principles.
James Vance•
The Main Effect Looked Simple Until an Interaction Appeared
Interpreting two-factor cross-terms when single variable regressions conceal reversal effects.
Sarah Jenkins•
More Experimental Runs Are Not Automatically Better
Run economy versus statistical power: avoiding unneeded replicates in high-precision processes.
Michael Rossi•
The Response Was Easy to Measure but Not Useful
Selecting meaningful critical-to-quality metrics instead of convenient secondary sensors.
Linda Park•
The Team Changed the Process Before the Experiment Was Finished
Managing operational drift, protocol adherence, and trial contamination on live assembly lines.