SWOT Analysis consists of analyzing a company or industry based on four criterion. These are as follows:
For more detailed instruction on how and why you should use SWOT Analysis please look at the following:
An Essential Guide to SWOT Analysis-This is one of the best guides I have seen!
SWOT Analysis-Strategy Tools from MindTools.com
QuickMBA SWOT Analyis
Wikipedia Article on SWOT Analyis