Instead of changing one factor at a time (OFAT), DOE allows you to vary multiple factors simultaneously. This captures —those "it depends" moments where Factor A only works if Factor B is also present. 2. The Three Pillars
If you don't design with the analysis in mind, you're just collecting anecdotes. Good DOE turns "I think this works" into "I have 95% confidence this works." Statistical design and analysis of experiments
Whether you're in a lab, a tech firm, or manufacturing, how you set up an experiment is often more important than how you analyze the data. Bad design leads to "noise" that no amount of fancy math can fix. Instead of changing one factor at a time