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Bandung is known as one of the cities that became the center of growth of textile and manufacturing industry in Indonesia. This development is inseparable from the growth of UMKM is getting better as well. One of the SMEs in Bandung is CV Karya Putra Ganesha (KPG). This company is a clothing manufacturing company in Bandung that continues to grow. In 2016 the company has a 30% revenue increase. However, the growth is not accompanied by improvements in product quality. By 2016 there are failed products that do not meet the expected specifications of 10.75%. This error occurs in the form of wrong embroidery, wrong color, wrong sewing, and wrong size. This research aims to find out how uncontrolled production process error in CV KPG. In addition, to find the factors that cause production errors and solutions in overcoming the problem. Seven Basiq tools are used in the troubleshooting process. The root-cause determination process begins by analyzing the business process flow-chart and recording all production errors in the year 2016 in the check-sheet. The histogram diagram shows the highest product error in July of 54 pcs and the highest proportion of January's fault of 16.5%. The p-chart analysis shows control limit (CL) of 0.1074, upper control limit 0.1256, and lower control limit of 0.0894. The control charts show that January, February, March, April, July, September, and November are months whose numbers of production errors are out of control. The pareto diagram shows a size error of up to 45% of the total production error and is the dominant factor that should be sought immediately. Fishbone diagram shows there are four factors causing the size error that is, methode, man, material, and machine. Through Fishbone analysis obtained root-cause size errors are caused by a decrease in engine quality due to rarely diservice and the number of employees who do not work according to operational standards and procedures. The solution provided there are two that is developing operational standards and work processes (SOP) and developing a good machine. Developing SOP begins by making a good SOP and then teaching it to new or old employees and then the controlling and evaluation activities every two weeks. Developing good working machine starts by checking the damage of each machine, then repairing the damaged machine, and servicing the machine every first week of every month.