US Patent 11372835 Data management system

A data management system includes a process reception processing unit that receives input of data in each of processes in plural stages of an item, a compression processing unit that compresses the received data in a case where the process reception processing unit receives the data, and stores the compressed data into a compressed data database, and a decompression processing unit that decompresses the compressed data stored in the compressed database at the predefined date and time before an acquisition process of acquiring data in another process, stored in the compressed database is started, and stores the decompressed data into a decompressed database, the acquisition process being included in the processes in the plural stages.