Monitoring device and monitoring method thereof, monitoring system, and recording medium in which computer program is stored

A monitoring method comprising:

• dividing time-series information from among pieces of time-series information obtained by associating pieces of information of a plurality of items related to an object to be monitored on a time-series basis over a predetermined period, the time-series information associated with each item to be modeled, into pieces of divided information of periods, each period shorter than the predetermined period, and generating models representing correlations related to the pieces of divided information;
• and
• by applying another time-series information obtained by associating the pieces of information of the plurality of items on a time-series basis during a period different from the predetermined period, to at least two or more of the models related to the each item, for each of the two or more of the models, determining whether the correlation represented by at least one or more of the models is maintained, and performing a determination related to the each item based on results of the determining.

A recording medium in which a computer program is stored, the program causing a computer to implement the functions of:

• dividing time-series information from among pieces of time-series information obtained by associating pieces of information of a plurality of items related to an object to be monitored on a time-series basis over a predetermined period, the time-series information associated with each item to be modeled, into pieces of divided information of periods, each period shorter than the predetermined period, and generating models representing correlations related to the pieces of divided information;
• and
• by applying another time-series information obtained by associating the pieces of information of the plurality of items on a time-series basis during a period different from the predetermined period, to at least two or more of the models related to the each item, for each of the two or more of the models, determining whether the correlation represented by at least one or more of the models is maintained, and performing a determination related to the each item based on results of the determining.