A system for inventory management comprises a processor and a memory. The processor is configured to receive restaurant reservation information. The processor is further configured to determine a first list of combinations and permutations of possible reservations available for one or more time periods based at least in part on the restaurant table configuration information. The processor is further configured to determine a second list of combinations and permutations of possible reservations available for the one or more time periods, wherein the second list removes combinations and permutations that are not available due to a selection of a reservation from the list. The memory is coupled to the processor and configured to provide the processor with instructions.