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, 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; • storing at least one predefined scenario comprising a first sequence of events to be received in a time interval threshold (ΔT s) and a first condition to be fulfilled, the first condition 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 of a second sequence of received events likely to the first sequence; the method being characterised in that it includes the following steps: • determining a second interval (ΔT 3) of emitting time of the second sequence between: ∘ the oldest emitting time of the time-stamped events; and ∘ the latest emitting time of the time-stamped events, the second received sequence corresponding to the first sequence of the predefined scenario; • checking the fulfilment of the first condition of the scenario as a function of the determined second emitting time interval (ΔT 3) and the time interval threshold (ΔT s) of the scenario, 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; and • generating a second state message (M2 ET) of the network when the first condition of the scenario is fulfilled. • acquiring a set of events (M1, M2, M3, M4) by a receiving equipment, 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; • storing at least one predefined scenario comprising a first sequence of events to be received in a time interval threshold (ΔT s) and a first condition to be fulfilled, the first condition 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 of a second sequence of received events likely to the first sequence; • determining a second interval (ΔT 3) of emitting time of the second sequence between: ∘ the oldest emitting time of the time-stamped events; and ∘ the latest emitting time of the time-stamped events, the second received sequence corresponding to the first sequence 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 of the scenario as a function of the determined second emitting time interval (ΔT 3) and the time interval threshold (ΔT s) of the scenario, 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; and • generating a second state message (M2 ET) of the network when the first condition of the scenario is fulfilled.