The design of the mold is usually done by the molder and the moldmaker.The selection of the method of gating,location of the gate, venting, parting line, and method of ejection affect the appearance and function of the part. Moldmakers vary from an individual owner with several helpers to plants with hundreds of employees. The quality of the mold bears no relation to the size of the shop. Inselecting a moldmaker, it is important to use one who has the best type of equipment for the job and who has had experience in building similar molds. Surveys have shown that moldmakers are leaving the industry about three times faster than they are being replaced. This situation has greatly increased the use of computer aided design and manufacturing (CAD/CAM) systems in moldmaking