We have a confident system to deal with customer's demands or contracts. (See the Q.C. chart 1 below)
In case of receiving complaints, our objective is to investigate and solve the problem until we meet client's satisfaction. (See the Q.C. chart 2 below)

Q.C.(Quality control) chart 1 [Planning – Mass production]

Q.C.(Quality control) chart 2 [Complaints – Quality control]