Detection method and apparatus

A detection method executed by a computer, comprising:

• executing, by a processor of the computer, a plurality of change point detection processes that detect respective change points of first time-series data with a plurality of granularities that are different in a width of a unit time;
• storing, by the processor, in a storage part, a first detection pattern that indicates an order of detection of the change points;
• detecting, by the processor, change points of second time-series data subsequent to the first time-series data with the plurality of different granularities;
• and
• generating, by the processor, an output that differs depending on whether a second detection pattern matches the stored first detection pattern, the second detection pattern indicating an order of detection of the change points of the second time-series data.

A detection apparatus, comprising

• a processor;
• and
• a memory storing a program that, when executed by the processor, to cause, the detection apparatus to
• execute a plurality of change point detection processes that detect respective change points of first time-series data with a plurality of granularities that are different in a width of a unit time;
• store, in a storage part, a first detection pattern that indicates an order of detection of the change points;
• detect change points of second time-series data subsequent to the first time-series data with the plurality of different granularities;
• and
• generate an output that differs depending on whether a second detection pattern matches the stored first detection pattern, the second detection pattern indicating an order of detection of the change points of the second time-series data.