In 2005, the company commissioned an analysis of Walkers Crisps, a product manufactured in the United Kingdom. It determined manufacturing accounted for only about 30 percent of the product’s carbon footprint. A plant program helped lower Crisps’ carbon footprint 7 percent, but additional improvements would only be possible with the cooperation of copackers and other suppliers. Key suppliers were invited to participate in the company’s Resource Conservation Model, which includes weekly data collection from utility meters, data reporting on current and year-ago energy performance, and benchmarking performance against goals.