Root cause analysis using Granger causality

A computer-implemented method, comprising:

• detecting, by a system operatively coupled to a processor, a cause of failure for a mechanical system by employing a greedy hill climbing process to perform a polynomial number of conditional independence tests to determine a Granger causality between variables from time series data of the mechanical system given a conditioning set.

A computer-implemented method, comprising:

• detecting, by a system operatively coupled to a processor, an onset of failure for a mechanical system by employing a greedy hill climbing process to perform a polynomial number of conditional independence tests to determine a Granger causality between variables from time series data of the mechanical system given a conditioning set.

A computer program product for analyzing a failure of a mechanical system, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:

• detect, by the processor, an onset of failure for the mechanical system by employing a greedy hill climbing process to perform a polynomial number of conditional independence tests to determine a Granger causality between variables from time series data of the mechanical system given a conditioning set.