The Washington Post Company has prevented the trouble only by changing part of its business to education; its testing and test-preparation service now brings in at least half the company's income.

Because it's positioned as a service, not a solution, data preparation may need to occur-new constituents may want to add content and deliver it via a portal with a specific lens.

If temporary system errors, network failures, or service unavailability occur, the data used in preparation of the call is lost.