The details of injection molding plastic are difficult to visualize. Moldflow analysis creates impressive graphics and animations that show the flow of plastic in an injection mold. The use of moldflow analysis helps to understand failures related to injection molding design and manufacturing, such as gate location, parting line location, design geometry, material flow, fiber alignment, vent locations, weld-line analysis, and cooling-line locations. All of these design considerations affect the strength and lifespan of a part.