A method for deciding on and evaluating the interleaving of several radar modes of at least one radar suitable for being carried on board a vehicle, in particular an aircraft, or suitable for being used on board a device for simulating the behaviour of the said vehicle, the said method being implemented by an electronic device for deciding on and evaluating the interleaving of radar modes, the method comprising the following successive steps: - obtaining a radar mission to be carried out, said mission comprising at least one objective to be fulfilled; - determination, according to a first set of predetermined constraints, of radar modes suitable for meeting at least one objective of said radar mission; the process being characterised in that it further comprises the following successive and hierarchical steps: - determination of a utility value, per radar sector to be covered, representative of the utility for each objective of said mission associated with each of said modes provided by the radar mode determination step; - at least on the basis of the said modes and their respective utility value, verification of the validation of at least a first necessary and predetermined condition for interleaving the said modes: - in the event of invalidation of said at least one first interleaving condition, repetition of said method starting from the step of determining radar modes according to a set of constraints modified from one iteration to the next; or - if said at least one first interleaving condition is validated, an attempt is made to determine the interleaving sequencing of said modes: - in the event of failure of said attempt to determine said sequencing, reiteration of said method starting from the verification step for at least one second interleaving condition of said necessary and predetermined modes modified with respect to said at least one first interleaving condition, and in parallel repeating said method from the step of determining radar modes according to a set of constraints modified from one iteration to the next; - if said attempt to determine said sequencing is successful, obtaining said sequencing. - obtaining a radar mission to be carried out, said mission comprising at least one objective to be fulfilled; - determination, according to a first set of predetermined constraints, of radar modes suitable for meeting at least one objective of said radar mission; - determination of a utility value, per radar sector to be covered, representative of the utility for each objective of said mission associated with each of said modes provided by the radar mode determination step; - at least on the basis of the said modes and their respective utility value, verification of the validation of at least a first necessary and predetermined condition for interleaving the said modes: - in the event of invalidation of said at least one first interleaving condition, repetition of said method starting from the step of determining radar modes according to a set of constraints modified from one iteration to the next; or - if said at least one first interleaving condition is validated, an attempt is made to determine the interleaving sequencing of said modes: - in the event of failure of said attempt to determine said sequencing, reiteration of said method starting from the verification step for at least one second interleaving condition of said necessary and predetermined modes modified with respect to said at least one first interleaving condition, and in parallel repeating said method from the step of determining radar modes according to a set of constraints modified from one iteration to the next; - if said attempt to determine said sequencing is successful, obtaining said sequencing. - in the event of invalidation of said at least one first interleaving condition, repetition of said method starting from the step of determining radar modes according to a set of constraints modified from one iteration to the next; or - if said at least one first interleaving condition is validated, an attempt is made to determine the interleaving sequencing of said modes: - in the event of failure of said attempt to determine said sequencing, reiteration of said method starting from the verification step for at least one second interleaving condition of said necessary and predetermined modes modified with respect to said at least one first interleaving condition, and in parallel repeating said method from the step of determining radar modes according to a set of constraints modified from one iteration to the next; - if said attempt to determine said sequencing is successful, obtaining said sequencing. - in the event of failure of said attempt to determine said sequencing, reiteration of said method starting from the verification step for at least one second interleaving condition of said necessary and predetermined modes modified with respect to said at least one first interleaving condition, and in parallel repeating said method from the step of determining radar modes according to a set of constraints modified from one iteration to the next; - if said attempt to determine said sequencing is successful, obtaining said sequencing.