Estimation of abnormal sensors

A method comprising:

• acquiring a plurality of sets of target data serving as an examination target, each set of target data output by a plurality of sensors;
• calculating, for each of a plurality of sensor groups such that each sensor group includes at least two sensors among the plurality of sensors, a degree of difference of a target data distribution of the plurality of sets of target data relative to a reference data distribution of output from each sensor group;
• and
• estimating one or more sensors to be a source of outlierness, based on a calculation result of the degree of difference of the target data.

A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to perform operations comprising:

• acquiring a plurality of sets of target data serving as an examination target, each set of target data output by a plurality of sensors;
• calculating, for each of a plurality of sensor groups such that each sensor group includes at least two sensors among the plurality of sensors, a degree of difference of a target data distribution of the plurality of sets of target data relative to a reference data distribution of output from each sensor group;
• and
• estimating one or more sensors to be a source of outlierness, based on a calculation result of the degree of difference of the target data.