IT CAN BE DIFFICULT TO DETERMINE THE QUALITY OR USEFULNESS OF PLASTIC FILLING-ANALYSIS PROGRAMS IF THE ONLY SOURCE OF INFORMATION IS THE SUPPLIER. ALTHOUGH USER FRIENDLINESS IS IMPORTANT, THE ACCURACY OF THE FLOW PROGRAM IS JUST AS CRITICAL, AND UNLESS THE USER IS AN EXPERT IN PLASTICS FLOW, HOW TO EVALUATE THE LIMITATIONS OF A PARTICULAR SOFTWARE PRODUCT MAY NOT BE KNOWN. THIS REPORT DISCUSSES THE PRACTICAL USES OF CAVITY-FILLING ANALYSIS FOR INJECTION MOLDING BY USING CASE STUDIES OF ACTUAL MOLDS. THE PURPOSE OF THE DISCUSSION IS TO IDENTIFY SOME OF THE INFORMATION THAT FLOW ANALYSIS CAN AND CANNOT PROVIDE TO THE MOLDMAKER (OR END CUSTOMER).