To overcome this barrier PG&E presented the retailer with the following information: The data required for participation in the program and the proposed use of that data. [...] Benefits to the retailer in participating in the program, including the size and scope of the program and the alignment of the program with the business strategy of the retailer. [...] Under agreement, the retailer is making the following data accessible for products in the trial portfolio: Product category and model number Total sales by model, date of sale and transaction number Store zip code The retailer is providing data for sales of products included in the program trial during the program period, as well as historical sales covering the preprogram sales period from. [...] By comparing these data to information collected during the trial period, the trial team can understand how changes to the mix of models affect the SWUEC of products in the program. [...] One of the barriers to the development of innovative programs of this type is the lack of availability of these data for many products not covered by state or federal efficiency standards or the EPA’s ENERGY STAR program.