Mastery of the situation will be very important research project. For that a project must involve people who are In-Charge and working in the relevant section. Person In charge who really understand the process flow, and the problem of raw materials, machinery and the type of damage that often occurs and the process of repair, defective products produced along with the frequent and so forth. Therefore, when there are problems can be directly aware of the problem point and picture completion.
Six sigma team must really have a solid skill for each job that needed improvement in research. The first one should be someone who really mastered the situation particularly on the process / section that will be the project. And the best person is the PIC (Person In-charge).