A proper DOE pays big dividends later

摘要

One of the "sacred cows" learned by many people is not to change too many things at once in an experiment or you won't be able to tell what worked and what didn't.Make only one change at a time and you have clear evidence of the result.Change one ingredient type or concentration,make one process change,expose the product to one type of stress such as temperature-the possible variables of formulation,process and manufacturing,and end-use environment are endless.So changing just one thing at a time makes sense.Or does it?