A method includes determining one or more storage systems storing information technology (IT) resource utilization data, establishing a set of data quality rules for controlling storage of the IT resource utilization data in the one or more storage systems to reduce unallocated IT resource utilization, and analyzing the IT resource utilization data stored in the one or more storage systems to detect data discrepancies affecting allocation of the IT resource utilization data, adjusting the IT resource utilization data stored in one or more of the storage systems to remedy a given data discrepancy associated with the IT resource utilization data, and modifying the set of data quality rules for controlling storage of the IT resource utilization data in the one or more storage systems to prevent the given data discrepancy from occurring on subsequent storage of the IT resource utilization data in the one or more storage systems.