Method for additively manufacturing at least one three-dimensional object by means of successive layerwise selective irradiation and consolidation of build material layers, whereby at least one build material layer which is to be selectively irradiated and consolidated comprises a plurality of irradiation zones being separately irradiatable and consolidatable with at least one first energy beam and with at least one second energy beam, comprising: - assigning a parameter (P1 - P4) indicative of the time required for irradiating a respective irradiation zone to a plurality of irradiation zones (IZ1 ― IZ4) of the respective build material layer, particularly to each irradiation zone (IZ1 ― IZ4) of the respective build material layer, characterized by: - assigning the at least one first energy beam to the irradiation zone whose parameter indicates that the irradiation zone (IZ1 - IZ4) has the longest time required for irradiating this irradiation zone and this irradiation zone being irradiated with the at least one first energy beam, - assigning the at least one second energy beam to the irradiation zone whose parameter indicates that the irradiation zone has the second longest time required for irradiating this irradiation zone and this irradiation zone being irradiated with the at least one second energy beam, wherein - after irradiation and consolidating the irradiation zone whose parameter indicates that the irradiation zone has the second longest time required for irradiating and being irradiated with the at least one second energy beam is completed, - assigning the at least one second energy beam to the irradiation zone whose parameter indicates that the irradiation zone has the third longest time required for irradiating this irradiation zone and this irradiation zone being irradiated with the at least one second energy beam; wherein in a possible case in which the parameters of two or more irradiation zones (IZ1 - IZ4) of a specific build material layer indicate that these two or more irradiation zones (IZ1 - IZ4) each have the longest time for irradiating or the longest time for being irradiated, respectively, a decision is made to which of these irradiation zones (IZ1 - IZ4) the at least one first energy beam is assigned and to which of these irradiation zones (IZ1 - IZ4) the at least one second energy beam is assigned. - assigning a parameter (P1 - P4) indicative of the time required for irradiating a respective irradiation zone to a plurality of irradiation zones (IZ1 ― IZ4) of the respective build material layer, particularly to each irradiation zone (IZ1 ― IZ4) of the respective build material layer, characterized by: - assigning the at least one first energy beam to the irradiation zone whose parameter indicates that the irradiation zone (IZ1 - IZ4) has the longest time required for irradiating this irradiation zone and this irradiation zone being irradiated with the at least one first energy beam, - assigning the at least one second energy beam to the irradiation zone whose parameter indicates that the irradiation zone has the second longest time required for irradiating this irradiation zone and this irradiation zone being irradiated with the at least one second energy beam, wherein - after irradiation and consolidating the irradiation zone whose parameter indicates that the irradiation zone has the second longest time required for irradiating and being irradiated with the at least one second energy beam is completed, - assigning the at least one second energy beam to the irradiation zone whose parameter indicates that the irradiation zone has the third longest time required for irradiating this irradiation zone and this irradiation zone being irradiated with the at least one second energy beam; wherein in a possible case in which the parameters of two or more irradiation zones (IZ1 - IZ4) of a specific build material layer indicate that these two or more irradiation zones (IZ1 - IZ4) each have the longest time for irradiating or the longest time for being irradiated, respectively, a decision is made to which of these irradiation zones (IZ1 - IZ4) the at least one first energy beam is assigned and to which of these irradiation zones (IZ1 - IZ4) the at least one second energy beam is assigned.