Abstract: The method according to a preferred embodiment of the present invention allows managing an inventory of items where a disconnection has been done between the physical item (as offered by a provider) and the marketing offering (which availability and price will be requested by a customer). A physical item can thus be marketed in several marketing offers, and a booking in one of those marketing offers is not directly assigned to a physical item but is allowed to “float” between them, so as to maximize the availability. The method according to a preferred embodiment of the present invention allows multi-days inventory containing more marketing products than physical ones. A preferred embodiment of the present invention provides the possibility to choose between a strong continuity for the bookings (the booking will be refused if it can not be placed continuously for the whole duration of its stay), or a softer continuity that allows possible changes of room type during the stay, while minimizing their numbers.