Abstract:
This research aims to study the work processes related to production planning, identify risks affecting production planning, and propose guidelines for improving production planning efficiency in a steel pipe manufacturing company. Utilizing the Failure Modes and Effects Analysis (FMEA) technique, the researcher conducted a study based on a literature review and information on work processes and machine operations. Data was collected from a sample of 11 individuals involved in production planning across five departments of the case study company through individual interviews using purposive sampling. The study analyzed defect factors and their causes based on the 5M1E principles, which were then used to populate the FMEA table to identify factors with severe risk values requiring corrective action. The risk priority numbers (RPN) were ranked, and solutions were summarized to enhance production planning efficiency. The research findings indicated 27 causes of defects with RPN risk levels of 100 points or higher, necessitating immediate attention and corrective measures. The defects with the highest RPN, in descending order by department, are as follows: 1) Production Department: RPN 560 points, due to insufficient and delayed procurement of raw materials 2) Purchasing Department: RPN 216 points, caused by suppliers having too many production orders, resulting in long waiting periods 3) Sales Department: RPN 180 points, due to the incorrect conversion of unit measurements for pipe sizes 4) Transportation Department: RPN 144 points, where inclement weather resulted in an insufficient number of available trucks 5) QC Department: RPN 140 points, where non-standard raw materials were not identified during inspection. The proposed guidelines for defect correction include purchasing planning in advance, maintaining a reserve of raw materials, increasing the number of suppliers, planning transportation logistics, and developing personnel knowledge in operational processes.