Analisis Penyebab Cacat Produk Keramik Tableware Yang Dihasilkan Mesin Dustpress Di PT. Sango Ceramics Indonesia Menggunakan Statistical Process Control (Spc)

Abstract

PT. Sango Ceramics Indonesia produce ceramics type tableware (such a glass, bowl, mug, plate and others) using four different types of molding machines namely dustpress machine, roller, high casting presurre (HPC) and machine casting. PT. Sango Ceramics Indonesia suffered a decline in the quality of the product is shown by an decrease in yield number . on all a kind of machine . Dustpress machine decreased yield of 12,98 % , casting machine of 0.7 % , HPC machine of 12,39 % , and roller machine of 11,13 % .Reduction in the value of yield shown increase of a defective product resulted in the process of rework rise so that led to increase in the production cost . This research aims to identify the most amount of defective product based on engines and defective product types to get an alternative solution to reduce the number of defect ceramic. This research use method Statistical Process Control (SPC) with tools that use the pareto diagrams, fishbone diagrams, control chart and proposal of improvement 5W+1H. The highest number of defects occurred in the product is produced by machine dust press. Most defect prodct is a type of defect tobi (pinhole on the surface of the glaze penetrate into the body) with a percentage of 82,19%. The proposed improvements are given based on the analysis of the cause use cause and effect diagram by 5W+1H. There are six repair proposal for a cause deformed by humans , environment , machine , methods and material