Cause inference device and cause inference method

A cause inference device that estimates a failure cause of construction of a system that constructs infrastructure resource in a predetermined execution environment, the cause inference device comprising:

• an arithmetic device that executes predetermined arithmetic processing and
• a storage device connected to the arithmetic device,
• the cause inference device is configured with a computer including the arithmetic device and the storage device,
• wherein the cause inference device includes:
• a cause table creation unit in which the arithmetic device is configured to create a cause table in which an error at the time of construction is recorded in association with the infrastructure resource, a constraint in the construction of the infrastructure resource, and a cause of the error by using construction information of the system and information of an execution environment assumed by the construction information of the system;
• and
• a cause inference unit in which the arithmetic device is configured to specify a cause of an error that occurs at the time of constructing the infrastructure resource with reference to the cause table.