The layered modeling support device (10) is a reading unit (11) that reads model data that is data indicating the three-dimensional shape of a model, and a region where the cutting unit of the cutting device passes between the plate and the model. A first generation unit (13) that generates primary data, which is data indicating a three-dimensional shape of the primary separation processing unit provided, and a cutting unit and a cutting in a process in which the cutting unit passes between the plate and the modeled object. A second generation unit (14) that generates secondary data for suppressing a change in the machining allowance based on the machining allowance with the target.
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