Design of Experiments (DE) is the set of " Sampling of Experiment Data " and " Analysis of Experiment Data ". Sampling of Experiment Data is designed for the Analysis of Experiment Data . method to take experiments efficiently. It is made by S. R. Fisher to take experiments of agriculture.
DE is also useful as the idea of Sampling even if we do not do any experiments.
Parameter Design is the method of experiments that Quality Engineering introduces.
The idea, Error factor , Mixed Orthogonal Array , Two Step Analysis , SN Ratio and Outside Arrangement of Orthogonal Array are added to the DE to analysis the quality data.
Design of Experiments is used in the field of Marketing to examine the preference of customers. It is called " Conjoint Analysis ".