Sean Ottewell has written an excellent introduction to the benefits of EnergySys software, correctly identifying the significant benefits arising from a hosted solution for production reporting and hydrocarbon allocation.
The EnergySys software sits on the company's own servers, along with all the storage, backup and support needed for the service aspect of the solution. It is an on-demand service, delivered via a low-cost, per user per month, subscription. All configuration and operation of the system is done using a standard web browser, and the flexibility and power of the tool is such that entire new applications can be built without the need for software changes.