We asked PC World readers to rate vendors in six product categories: laptops, desktops, printers, digital cameras, routers, and MP3 players. Each category contained nine subsections for rating a vendor in specific areas of customer service or product reliability. Each company was judged relative to its competitors.
In each subsection, we distributed every vendor's score into one of three rating categories: significantly better than average, not significantly different from average, or significantly worse than average. If a vendor drew fewer than 50 responses in a subsection, we discarded the results as statistically unstable. Some smaller vendors received too few votes for us to accurately rate their reliability and service.
We polled more than 60,000 PC World and PCWorld.com readers who responded to print advertisements and e-mail messages. We used methods of statistical analysis to determine which companies were significantly better or worse than the average, based on all responses about a certain product type.
Because our survey sample consists entirely of PC World's generally tech-savvy readers, it may not be representative of the general population, which may have different expectations and experiences with technology products.
