1. A method for monitoring an operation of an IT infrastructure comprising a plurality of calculation nodes, and an interconnection network that connects together the plurality of calculation nodes, said method comprising: selecting, via a sequencer, calculation nodes in order to perform at least one calculation; said sequencer being in communication with said calculation nodes via the interconnection network, said sequencer comprising a non-transitory memory encoded with instructions to implement the method for monitoring the operation of the IT infrastructure; performing said calculation via said selected calculation nodes; attributing, via said sequencer, a score to each one of the calculation nodes having participated in said calculation performed, with each score reflecting a difference between a measured operating parameter of the calculation node for which said score is attributed and a reference operating parameter of said calculation node for which said score is attributed, and verifying, via said sequencer, the operation of said calculation nodes having participated in said calculation performed, said verification being carried out using scores attributed to the calculation nodes having participated in said calculation.