The choice of casting method; It is determined depending on the shape, size and wall thickness of the part, its mechanical properties, surface roughness, whether the alloy is suitable for which casting method, and the tolerance of the protrusion angles. In addition , the requested production quantity is also taken into account . According to these, a runner design is made, then the simulation is run. According to the simulation result, if there is an error, the runner and feeder design is reviewed again, if it is at a level that cannot be corrected, revision may be requested on the part or the problem is solved by changing the casting method.