This chapter discusses a number of uses for RSM: (a) to improve product design, (b) to provide experience in scientific "investigation, (c) for possible simplification due to data transfom1ation, (d) for detecting· and exploiting active factor space with multiple-response problems , (e) for detecting and exploiting active canonical spaces for multiple-response problems, and (t) for movement from empirical to theoretical mechanism. Provide real or imagined examples for each kind of application. Do not use the illustrations in this chapter.