As price deflation piles pressure on margins and electrical retailers seek ways to differentiate themselves from the competition through range and customer service, do you know who customers themselves rate the most highly on these and other key performance drivers? A retailer's performance is subject to a myriad of factors which serve to boost or dampen growth, from overall economic performance to deflationary pressure from rivals and operating cost inflation. But the principal driver behind performance is also the most difficult to measure - customers and their fluid, evolving opinions. These opinions drive customer behaviour, and ultimately sales and profits. As such, the customer is the single most important element of the retail equation. The Index we have devised is the only available system of performance benchmarking which is defined by the customer. It measures how satisfied customers are with the retailers they use, and as such allows you to really understand your customers - and your rivals'. The Consumer Satisfaction Index 2005 sector report: electricals covers 10 retailers including supermarkets Tesco and Asda as well as specialist national chains such as Currys and Comet and department stores John Lewis and Co-op.