Recently Siemens NX CAM introduced a new tool path on it NX12 version named Adaptive milling,
This adaptive milling is generally called as high speed milling, Siemens says, this milling works with 2 to 3 L/D (length by diameter)in axial and 10-12% in radial depth of cuts based on material. The intelligence of NX create tool path, which maintain constant chip thickness.
Bottom up option,
Also it introduced an option called bottom up, inside the tool path, will starts the milling from deeper level of depth and reaches the higher level. which reduce the work rest machining tool path a little more.
The below video will explain tool path still better.