Viswanath Gondi points to an article on Web Traffic Analytics and User Experience, which provides “a step by step process of analyzing website logs. The important points are, convert numbers to percentages, its easier to compare. Use a spread sheet to derive metrics and comparison graphs. The analysis helps in caliculating the return on investment on the design. Software like Webtrends, IBM Surfaid, Omniture SiteCatalyst help in doing the analysis by providing useful derived metrics.”