The research aims to improve metal molding processes in automotive-part industry. This scope of study involved in mold producing procedures from taking order, confirming order, mold producing, and mold operating. The study of factory information indicates that there are some defect parts in mold producing which cause to maintenance during mold operating. The four causes of this problem are inappropriate mold designs, incorrect procedures of the mold part, incorrect mold fixture, and depreciation of mold operation. The fish bone diagram is used to analyze the causes to find and evaluate the priority of failure. The Failure Mode and Effect Analysis [FMEA] techniques and Risk Priority Number [RPN] are applied to priority and the failure. Eleven corrections are ; (1) Improve and co-ordinate between customers and involved departments. (2) Improve the process to confirm the parts needed by customers. (3) Improve the imported material examining process. (4) Indicate sequence of mold producing. (5) Apply FMEA to producing processes. (6) Schedule maintenance periods. (7) Improve maintenance process. (8) Improve measurement systems. (9) Indicate Key Performance Indicator [KPI] of mold designing and producing procedures. (10) Train employees, and (11) Correct mold work instructions. The results of improving are as follow; the delay of mold producing decreases from 12.50% to 0% in one month consequently. The defect parts in producing procedures decreases from 7.69% to 2.73% in one month, 0.78% in two month, and 1.02% respectively. The twenty-seven times maintenance before procedures improving decreases to between four to two times for each month. and Risk Priority Number decreases 55.19% on average. In conclusion, the factory which to be related to metal molding processes, can use this methodology as guideline to improvement processes and to increases efficiency continuously.