Design, Distribution, Cost
Rich Internet applications use a Rich Client deployment model (deployment of a compiled client application through a browser) rather than a thin-client-server model (where the user's view is largely controlled from the server).
Flash, Silverlight and Java are application platforms accessed by the user's web browser as plug-ins. These application platforms limit the amount of data downloaded during initialization to only what is necessary to display the page. The browser plug-in is only downloaded once, and does not need to be re-downloaded every time the page is displayed; this reduces application load time, bandwidth requirements, and server load.
Proponents of RIAs assert that the cost of RIA development and O&M is typically lower than that of HTML-based alternatives due to increased developer productivity and standardized, backwards compatible nature of the application platform runtime environments. A 2010 study conducted by International Data Corporation demonstrated an average savings of approximately $450,000 per application in the case of Flash platform development (in conjunction with use of the open source Flex SDK), a 39% reduction in cost over a three-year period.
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