A method for manufacturing a workpiece comprising: - fusing an area of a layer of a fusible material by irradiating the surface of the area of the layer using a number n, n ≥ 2 of at least two beam sources to project a corresponding number of n beam spots on n sets of locations ( L i) of said surface area of the layer, wherein ∘ each beam source has a predefined fuse rate ( R i) and a field of view ( F i), ∘ L i ∩ L j ≤ 1 4 Max L i L j, ∀ i ≠ j and ∘ the indices of L i, R i and F i symbolize the respective beam source, i.e. 0 < i ≤ n and the set of all beam source indicating indices is I = {1,..., n}; characterized in that the method further comprises at least the steps of: 1.1. estimating an optimum fusing time t o ( i) and/or a size of an optimum fusing area L i opt, for the area at least for the first beam source, i.e. for at least a first index i = 1, 1.2. determining intersecting sets ( IS i) of the surface area and the fields of view ( F i) for at least a first index i = 1, i.e. assigning IS i: = An F i, at least for i= 1; 1.3. comparing the size of the intersecting sets (| IS i |) to the product of the optimum fusing time t o ( i) with the fuse rate R i of the corresponding i th -beam source and/or to the optimum size of the fusing area L i opt and if the relation t o · R i < | IS i | and/or L i opt < IS i holds true, then 1.3.1. determine a subtrahend surface S i with S i c IS i and at least one of (1 - α i)(| IS i | - t o ( i) · R i) ≤ | S i | ≤ (1 + α i)(| IS i | - t o ( i) · R i), and 1 − α i IS i − L i opt ≤ S i ≤ 1 − α i IS i − L i opt wherein α i E {0.25, 0.2, 0.15, 0.1, 0.05, 0.025, 0.01,0.005,0} under the condition that for each p i ∈ S i, 3 F k | p i ∈ F k, k > i, and 1.3.2. assign L i: = IS i - S i, and 1.4. fusing the fusible material at the locations of the set of locations L i using the i th -beam source is executed after step 1.3.2. - fusing an area of a layer of a fusible material by irradiating the surface of the area of the layer using a number n, n ≥ 2 of at least two beam sources to project a corresponding number of n beam spots on n sets of locations ( L i) of said surface area of the layer, wherein ∘ each beam source has a predefined fuse rate ( R i) and a field of view ( F i), ∘ L i ∩ L j ≤ 1 4 Max L i L j, ∀ i ≠ j and ∘ the indices of L i, R i and F i symbolize the respective beam source, i.e. 0 < i ≤ n and the set of all beam source indicating indices is I = {1,..., n}; characterized in that the method further comprises at least the steps of: 1.1. estimating an optimum fusing time t o ( i) and/or a size of an optimum fusing area L i opt, for the area at least for the first beam source, i.e. for at least a first index i = 1, 1.2. determining intersecting sets ( IS i) of the surface area and the fields of view ( F i) for at least a first index i = 1, i.e. assigning IS i: = An F i, at least for i= 1; 1.3. comparing the size of the intersecting sets (| IS i |) to the product of the optimum fusing time t o ( i) with the fuse rate R i of the corresponding i th -beam source and/or to the optimum size of the fusing area L i opt and if the relation t o · R i < | IS i | and/or L i opt < IS i holds true, then 1.3.1. determine a subtrahend surface S i with S i c IS i and at least one of (1 - α i)(| IS i | - t o ( i) · R i) ≤ | S i | ≤ (1 + α i)(| IS i | - t o ( i) · R i), and 1 − α i IS i − L i opt ≤ S i ≤ 1 − α i IS i − L i opt wherein α i E {0.25, 0.2, 0.15, 0.1, 0.05, 0.025, 0.01,0.005,0} under the condition that for each p i ∈ S i, 3 F k | p i ∈ F k, k > i, and 1.3.2. assign L i: = IS i - S i, and 1.4. fusing the fusible material at the locations of the set of locations L i using the i th -beam source is executed after step 1.3.2. ∘ each beam source has a predefined fuse rate ( R i) and a field of view ( F i), ∘ L i ∩ L j ≤ 1 4 Max L i L j, ∀ i ≠ j and ∘ the indices of L i, R i and F i symbolize the respective beam source, i.e. 0 < i ≤ n and the set of all beam source indicating indices is I = {1,..., n}; 1.1. estimating an optimum fusing time t o ( i) and/or a size of an optimum fusing area L i opt, for the area at least for the first beam source, i.e. for at least a first index i = 1, 1.2. determining intersecting sets ( IS i) of the surface area and the fields of view ( F i) for at least a first index i = 1, i.e. assigning IS i: = An F i, at least for i= 1; 1.3. comparing the size of the intersecting sets (| IS i |) to the product of the optimum fusing time t o ( i) with the fuse rate R i of the corresponding i th -beam source and/or to the optimum size of the fusing area L i opt and if the relation t o · R i < | IS i | and/or L i opt < IS i holds true, then 1.3.1. determine a subtrahend surface S i with S i c IS i and at least one of (1 - α i)(| IS i | - t o ( i) · R i) ≤ | S i | ≤ (1 + α i)(| IS i | - t o ( i) · R i), and 1 − α i IS i − L i opt ≤ S i ≤ 1 − α i IS i − L i opt wherein α i E {0.25, 0.2, 0.15, 0.1, 0.05, 0.025, 0.01,0.005,0} under the condition that for each p i ∈ S i, 3 F k | p i ∈ F k, k > i, and 1.3.2. assign L i: = IS i - S i, and 1.3.1. determine a subtrahend surface S i with S i c IS i and at least one of (1 - α i)(| IS i | - t o ( i) · R i) ≤ | S i | ≤ (1 + α i)(| IS i | - t o ( i) · R i), and 1 − α i IS i − L i opt ≤ S i ≤ 1 − α i IS i − L i opt wherein α i E {0.25, 0.2, 0.15, 0.1, 0.05, 0.025, 0.01,0.005,0} under the condition that for each p i ∈ S i, 3 F k | p i ∈ F k, k > i, and 1.3.2. assign L i: = IS i - S i, and 1.4. fusing the fusible material at the locations of the set of locations L i using the i th -beam source is executed after step 1.3.2.