This project proposed to design a system to mark the workpiece (s) of the company (Thailand) CO.LTD P.C.S Machine current state of the system marks it. Use the how to write a good statement of 2 per piece of work, and when finished, 1 line to bring the workpiece to the total invoice with bag job to fill in the system, which will cause problems when the work statement is not adjacent to the work piece, sometimes employees.May lose or forget the flyer lost or worn out to be oil and burn a good statement of 2 to 1, it causes loss of time without benefit. Clinical data collected and analyzed using the theory of cause-and-effect chart (Fish Bone Diagram), and can be linked to the process of solving the quality problem (QC Story) To find out the actual cause is caused by negligence of the employee and the materials used to make good advices. Those trials are designed and improved workpiece mark system damaged. Strap design with text field and important color according to the type of problem, and can be seen next to the piece of work, we designed a strap made from 1-piece which Uni Paint Marker pen use PVC in writing can be deleted by using paint thinner.