1. A method for operating a network of interconnected items of physical equipment the method comprising: registering, by an infrastructure management apparatus, each of a network of interconnected items of physical equipment as a resource in a first data structure, with an equipment identifier and a first sequence of dated values of at least one of a processing, storage, or transmission capacity of the equipment defining a global, utilizable capacity of the resource; registering, by the infrastructure management apparatus, a plurality of virtual units in a second data structure, with an identifier of the unit and a second sequence of dated values of a processing, storage, or transmission capacity of the virtual unit defining a global utilizable capacity of the unit, the registering further comprising generating a third data structure in which a virtual unit identifier is associated with a group of resource identifiers and the corresponding sequences of dated capacity values, the first, second and third data structures thereby defining a virtual infrastructure object corresponding to a virtual unit identifier and a correlation between the first and second sequences of dated values of the at least one of the processing, storage or transmission capacity; and maintaining, by the infrastructure management apparatus, requested rights and capacities for users as a function of time in response to a received re-provisioning or reservation request; and dynamically reconfiguring, by the infrastructure management apparatus, the virtual infrastructure object in relation to the requested rights and capacities, comprising at least one of reconfiguring the content of the third data structure or reconfiguring the content of the first data structure.