The document describes the evolution of the structure of the apparel industry over 40 years through 5 distinct stages: 1) The immediate post-World War II era had a simple structure with sales, manufacturing, and CEO roles. 2) In the 1960s, marketing became important and was added to the structure. 3) In the late 1960s, design and merchandising roles were added. 4) In the 1970s-1980s, market research was incorporated and responsibilities shifted from production to consumer needs. 5) The current structure has specialized roles across marketing, merchandising, design, sourcing, manufacturing, and finance/administration.