Overview

Cloud computing is computing in the form of a service rather than a product. Shared resources, software, and data are provided to computers and other devices via a network (typically the Internet) that basically acts like a utility (like the electricity grid). The cloud provides computation, software, data access, and storage services that do not require end-user knowledge of the physical location and configuration of the system that delivers the services. This concept meets a wide-spread need of IT: a way to increase capacity or add capabilities on the fly without investing in new infrastructure, training new personnel, or licensing new software. Cloud computing encompasses any subscription-based or pay-per-use service that extends IT's existing capabilities in real time using the Internet. The services provided by cloud computing can be categorized in three different models:

This document only relates to SaaS, that is, providing ARIS services in a cloud instance with access to these services via the Internet from anywhere. For this solution, we distinguish between three provisioning models:

The following sections provide more details on the two different concepts and all necessary configurations for PPM.