To near observers, utility computi...

To near observers, utility computing, also known as on-demand computing, is not that far remov from the days of mainframe time-sharing. Adding capacity was a basic exercise of adding more central processing units, disk storage or random access memory, each of which had fairly predictable expenses that could be allocated forward a per user or by application basis and were ofttimes included in an information technology charge-back type

This perspective, however, oversimplifies today's computing environment. Along with incredible gains in period of times of compute power per dollar and putting the applications directly in the hands of the users