Picture walking into your favorite store. The racks aren’t random — every single item you see, from the colors to the sizes to the number of options in each style, is there because a team made deliberate, data-driven decisions behind the scenes. This chapter is about those decisions: how retailers decide what to sell, how much variety to offer, and when to let go of items that aren’t pulling their weight. We’ll explore the frameworks that turn a chaotic pile of products into a purposeful, profitable assortment that feels just right to shoppers like you.