Abstract
When engineers see a case study of Robust Design, particularly one involving recent technologydevelopment, they feel that it is quite dlfferent from the traditional DOE (design of Experiment). What are the differences between traditional characteristics and the SN ratioof dynamic and static characteristic of quality engineering? ln addition, what relationships do they have ? Therefore, I would like to explain characteristics for quality improvement, comparing the SN ratio of dynamic and static characteristic in quality engineering to the traditional characteristics.
