In the current production HSA of HGST (Thailand) co., Ltd., at Quasi tester station have process of several steps. The preparation procedure that can reduce an employee's working procedure. By creating a prototype for the test results of the prototype. The process can reduce employee flow has 25 percent of the total work flow. And employees are satisfied with the prototype, representing 80 percent of all employees. The prototype can also shorten the working time of 39.23 percent during normal working time, Including production costs can also be reduced by approximately six million baht per year