An In-Process Workpiece is how NX tracks the material removed from your raw stock to the final model based on the toolpaths of generated operations. Using this feature, you can drive toolpaths to only cut material that’s been left behind by previous toolpaths or operations. Take a look at the video.
In this video, NX CAM Application Engineer, Tony Lisle, demonstrates various uses of the In-Process Workpiece.
In the first example, you can see Tony runs operations on one side of a part in a vice, and the other side of the part on a palette. He has both sides of the part appearing in the current NX CAM screen.
After finishing the operations of the part in the vice, he moves to the other side of the part on the palette.