A method for safeguarding the supervision of a synchronised network for managing an alarm generation, the method comprising: • acquiring a set of events (M1, M2, M3, M4) by a receiving equipment (R), said events (M1, M2, M3, M4) comprising a timestamp corresponding to the emitting time of said event; • storing the events (M1, M2, M3, M4) received by the receiving equipment (R); • storing at least one predefined scenario (SC) comprising a first sequence (S1) of events to be received in a time interval threshold (ΔT s ) and a first condition (CD1) to be fulfilled, the first condition (CD1) being for checking whether a measured time interval of a sequence or a part of a sequence is higher than or lower than the time interval threshold (ΔT s ); • detecting at least one part (pS2) of a second sequence (S2) of received events likely to the first sequence (S1); the method being characterised in that it includes the following steps: • determining a second interval (ΔT 3 ) of emitting time of the second sequence (S2) between: ∘ the oldest emitting time of the time-stamped events; and ∘ the latest emitting time of the time-stamped events, the second received sequence (S2) corresponding to the first sequence (S1) of the predefined scenario; • checking the fulfilment of the first condition (CD1) of the scenario (SC) as a function of the determined second emitting time interval (ΔT 3 ) and the time interval threshold (ΔT s ) of the scenario (SC), the first condition to be fulfilled being checking that the emitting time interval (ΔT 3 ) is lower than or equal to the time interval threshold (ΔT s ) of the scenario (SC); and • generating a second state message (M2 ET ) of the network when the first condition (CD1) of the scenario is fulfilled. • acquiring a set of events (M1, M2, M3, M4) by a receiving equipment (R), said events (M1, M2, M3, M4) comprising a timestamp corresponding to the emitting time of said event; • storing the events (M1, M2, M3, M4) received by the receiving equipment (R); • storing at least one predefined scenario (SC) comprising a first sequence (S1) of events to be received in a time interval threshold (ΔT s ) and a first condition (CD1) to be fulfilled, the first condition (CD1) being for checking whether a measured time interval of a sequence or a part of a sequence is higher than or lower than the time interval threshold (ΔT s ); • detecting at least one part (pS2) of a second sequence (S2) of received events likely to the first sequence (S1); • determining a second interval (ΔT 3 ) of emitting time of the second sequence (S2) between: ∘ the oldest emitting time of the time-stamped events; and ∘ the latest emitting time of the time-stamped events, the second received sequence (S2) corresponding to the first sequence (S1) of the predefined scenario; ∘ the oldest emitting time of the time-stamped events; and ∘ the latest emitting time of the time-stamped events, • checking the fulfilment of the first condition (CD1) of the scenario (SC) as a function of the determined second emitting time interval (ΔT 3 ) and the time interval threshold (ΔT s ) of the scenario (SC), the first condition to be fulfilled being checking that the emitting time interval (ΔT 3 ) is lower than or equal to the time interval threshold (ΔT s ) of the scenario (SC); and • generating a second state message (M2 ET ) of the network when the first condition (CD1) of the scenario is fulfilled. <EOS>