Patent ID: 8341031

Claim:
A computer-implemented method for checking availability of a ware in a time interval, a resource to produce the ware being associated with the ware, the method comprising: obtaining, by a computer system, capacity supply information of the resource comprising a capacity supply for each date of the time interval, wherein the time interval comprises a plurality of dates, obtaining, by the computer system, capacity demand information for the resource comprising a capacity demand for each date of the time interval, in response to receiving an update information indicating that a first date of the time interval has been set to a later date, for each date from the first date to the later date in chronological order: designating, for production by the resource on each date from the first date to the later date, production orders that have been released by each date until either i) the resource has no remaining capacity supply on each date or ii) all of the productions orders that have been released by each date have been designated, determining, by the computer system, whether the resource has capacity supply on each date from the first date to the later date that is unused after the designating, and if a specific amount of capacity supply is unused for each date from the first date to the later date, eliminating the specific amount of capacity supply from the capacity supply information to generate modified capacity supply information for the resource, and in response to receiving a demand information representing a demand having a requested date, determining availability of the resource on the requested date using the modified capacity supply information and the capacity demand information.