Talbot's is a women's clothing store that offers classic fashions at a slightly premium price (i. e., a wool skirt typically costs over $100). During the process of market segmentation, Talbot's identified a group of consumers who are larger than average women yet still want stylish clothing. Further research into this segment revealed that these women tend to be between the ages of 35 and 50, are career-oriented, have a household income over $50,000, and are married with children under the age of 18 living at home. This group is also heavy users of magazines and newspapers as well as prime-time television. Which step of market segmentation does this describe?