Disclosed is a method, a system and a computer program that is embodied on at least one computer readable medium for service provisioning a customer with at least one software application from a service provider. In the case of the computer program embodiment there is provided first executable code for establishing a set of attributes of the service provision; second executable code, responsive to a user input, for selecting from the set of attributes for defining a Service Level Agreement (SLA) with the service provider; third executable code for provisioning the customer, within the constraints imposed by the SLA, by allocating at least some required data processing resources to at least one of the service provider, the customer, to another service provider, or to a data processing site that offers data processing capacity for use; and fourth executable code for transparently re-provisioning the customer, within the constraints imposed by the SLA, by re-allocating at least some required data processing resources between at least one of the service provider, the customer, the another service provider, or the data processing site that offers data processing capacity for use.