1. A method for simulating a work process on a machine tool using a virtual machine that is set up to simulate a process for machining the workpiece on the machine tool using machine data, workpiece data, and tool data as a function of numerical control (NC) control data and programmable logic controller (PLC) control data, wherein simulation of the work process is performed on a platform that comprises a plurality of processor cores, and wherein the simulation of the work process is performed by generating partial programs which run in parallel on different processor cores, further comprising steps of: subdividing a machining operation of the work process on the machine tool into different machining sections for a workpiece from an unmachined part, via different semi-finished part stages, to a machined part; performing partial simulations of the machining sections; establishing a geometry of the workpiece for the start of each machining section and storing a corresponding workpiece geometry in a 3D model; saving entry marks at the start of preselected machining sections in preselected NC control instructions for machining the workpiece as part of the machining operation; transferring a plurality of machining sections to different processor cores using the corresponding entry marks; transferring current workpiece geometries corresponding to the respective machining section of the NC control instructions to different processor cores; and performing parallel partial simulation of the transferred machining sections by the different processor cores.