The fast food chain wanted to increase milkshake sales. Initially they focused on improving the product but sales did not increase. They then focused on customers and market segments but still saw no results. Researchers realized people were buying milkshakes to alleviate boredom during their commute. Interviews found taste was unimportant; ease of consumption with one hand and portability were priorities. Installing a self-serve kiosk made purchasing more convenient for commuters and increased sales without changing the product. The document discusses how focusing on jobs-to-be-done, rather than products, customers, or segments, provides a framework for understanding user needs and developing effective solutions.