Flow analysis is the first stage of the molding simulation process. Flow calculates the melt front advancement that grows through the part from the injection location, and continues until the switch-over point to packing. Flow analysis provides the ability to simulate, identify, and optimize the process to avoid molding uncertainty or resolve an existing injection molding problem.

Filling analysis is only the first stage in a series of cost saving analyses. Packing analysis builds on the results of the filling analysis by extending the first stage of the injection molding process into the packing phase. This second stage fills the non-filled portion of the mold with additional material to compensate for the loss in volume as the material shrinks. The part is then held under pressure while it solidifies.