Detailed analysis on theory and execution of SaaS

Once Upon a time everyone said SOA (Service Oriented Architecture) would rescue the software industry, but several years later they claimed the silver bullet called “SaaS” (Software as a Service), and nowadays the most popular word around commercial software is BI (Business Intelligence). Do we find so many completely different but available solutions in a short while? Or we just talk about the same thing that presets in different knowledge phases? This paper will strive to point out the substance of these so-called terminologies, and of course, make a sharp demonstration to show the power of “Software as a Service” spirit in catering industry.