I computed a bounding volume in a hyper-dimensional space containing all sensor instruments on the system. The volume was constructed to encompass the entire se

I computed a bounding volume in a hyper-dimensional space containing all sensor instruments on the system. The volume was constructed to encompass the entire sensor state space of many previously recorded "normal" operating periods (from startup through steady-state and shutdown). New operating regimes where then compared to the volume, and any excursions were considered diagnostically relevant conditions. The cool part (to me, at least) was that the direction of the vector as system state trajectory exited the volume could be put through a classifier that would effectively tell you what went wrong.