A system includes a first memory to store instrument IDs associated in a one-to-one correspondence with instruments, a second memory to store set IDs associated in a one-to-one correspondence with surgical instrument sets each including a plurality of instruments, a third memory to store work histories of the instruments each identified by a respective one of the instrument IDs, each of the work histories stored in association with the respective one of the instrument IDs and including work information about repair work, and a fourth memory to store work histories of the surgical instrument sets each identified by a respective one of the set IDs, each of the work histories stored in association with the respective one of the set IDs and including work information about repair work.