Patent ID: 8175467

Claim:
A method for detecting a state of a system including a plurality of apparatuses, performed by a state detecting system including a first detector and a second detector, the method comprising: first obtaining, using the first detector, first information of a first selected apparatus and a second selected apparatus, the first selected apparatus and the second selected apparatus being at least two of the plurality of apparatuses of the system, the first information indicating a current state of the first selected apparatus and the second selected apparatus; first determining, using the first detector, whether the first selected apparatus is in an abnormal or maintenance state and whether the second selected apparatus is in the abnormal or maintenance state, based on the first information by comparing the first information with a first threshold value to generate a first determination result; second obtaining, using the second detector and only when the first determination result indicates that the first selected apparatus is in the abnormal or maintenance state and the second selected apparatus is not in the abnormal or maintenance state, second information of only the second selected apparatus as at least one of the plurality of apparatuses which is not determined to be in the abnormal or maintenance state in the first determining, the second information used for predicting whether the second selected apparatus will be in the abnormal or maintenance state within a predetermined period of time; and second determining, using the second detector, whether the second selected apparatus is in a second state based on the second information, and to generate a second determination result when the first selected apparatus is determined to be in the abnormal or maintenance state and the second information of the second selected apparatus indicates the second selected apparatus is predicted to be in the abnormal or maintenance state within the predetermined period of time.