noun
corrective maintenance
Technical term in computing and engineering for maintenance performed after a failure has occurred, as opposed to preventive maintenance.
事後保全は故障が起きてから行う保守作業です。
Corrective maintenance is maintenance work carried out after a failure occurs.
予防保全 is preventive maintenance, performed before a failure occurs, while 事後保全 is corrective maintenance after a failure.
Compound of 事後 (after the fact) and 保全 (maintenance, preservation).