In reality, such product defects require more extensive test series, which, depending on experience and problem, can range from systematic test series to trial-and-error. Even if the costs for material, equipment and working time are left out, it needs a lot of time. After a few trials, the process can run better, but still leaves room for more improvement. Here, simulation, for example with Virtual Molding, can be of great help: It enables the process engineer to gain deep insights into the shaping of the part. Here, the injection mold is virtually assembled with all details (including material data of all individual parts). Materials can be tested alternatively. The settings of the machine, movements, temperatures, etc. can be easily adjusted and changed. Test series, taking weeks in reality, can be automatically calculated and evaluated on the computer within hours or a few days.