Computer-implemented method for determining at least one region (12, 14) in at least one input model for at least one element to be placed, comprising the following steps: a. receiving an input data set comprising the at least one element to be placed, a plurality of conditions and the at least one input model; wherein the input model is a two-dimensional or three-dimensional digital model; b. determining at least one associated condition from the plurality of conditions; and c. determining at least one region of the at least one input model, wherein the at least one determined region, depending on the associated condition, is a valid region or an invalid region; wherein d. the at least one valid region satisfies the associated condition at least in part; e. displaying the at least one valid region and/or the at least one invalid region by means of a display unit; wherein the display unit is configured as virtual reality, VR, glasses; f. placing the at least one element to be placed into the at least one determined region of the input model; wherein the placing comprises - determining the position or location of the placement of the at least one element to be placed in the at least one determined region by way of the viewing direction of a user and carrying out at least one placement measure; - outputting a placement error after unsuccessful placement in the case of an error if the determined position or location of the placement is in an invalid region; g. adapting the at least one input model by determining and adding the position or location of the placed element and/or adapting other associated data of the placed element after carrying out the at least one placement measure; and h. updating the at least one input model on the basis of the adapted data. a. receiving an input data set comprising the at least one element to be placed, a plurality of conditions and the at least one input model; wherein the input model is a two-dimensional or three-dimensional digital model; b. determining at least one associated condition from the plurality of conditions; and c. determining at least one region of the at least one input model, wherein the at least one determined region, depending on the associated condition, is a valid region or an invalid region; wherein d. the at least one valid region satisfies the associated condition at least in part; e. displaying the at least one valid region and/or the at least one invalid region by means of a display unit; wherein the display unit is configured as virtual reality, VR, glasses; f. placing the at least one element to be placed into the at least one determined region of the input model; wherein the placing comprises - determining the position or location of the placement of the at least one element to be placed in the at least one determined region by way of the viewing direction of a user and carrying out at least one placement measure; - outputting a placement error after unsuccessful placement in the case of an error if the determined position or location of the placement is in an invalid region; - determining the position or location of the placement of the at least one element to be placed in the at least one determined region by way of the viewing direction of a user and carrying out at least one placement measure; - outputting a placement error after unsuccessful placement in the case of an error if the determined position or location of the placement is in an invalid region; g. adapting the at least one input model by determining and adding the position or location of the placed element and/or adapting other associated data of the placed element after carrying out the at least one placement measure; and h. updating the at least one input model on the basis of the adapted data.