INFORMATION SYSTEM RELIABILITY EVALUATION SYSTEM, RELIABILITY EVALUATION METHOD, AND RELIABILITY EVALUATION PROGRAM

摘要

An information system reliability evaluation system includes: an input unit (2) for inputting failure information corresponding to a failure mode of a constituent element indicating hardware, system configuration information, and a system non-operation ratio reference value; a creation unit (32) for creating a fault tree according to the system configuration information; a calculation unit (34) for calculating the non-operation ratio corresponding to the failure mode based on the analysis result of the failure information and calculating the system operation ratio according to the calculated non-operation ratio and the fault tree; a judgment unit (35) for judging whether the system operation ratio has reached the reference value; an extraction unit (36) for extracting a basic event relating to the increase of the system operation ratio when the system operation ratio has not reached the reference value; an resetting units (38, 39) for resetting a new non-operation ratio and the like according to the state whether the non-operation ratio of the basic event extracted can be lowered.