The important thing in QOS that process coach needs to know is that internal indicators (such as C/1000 and FTT) and external indicators (such as TGW Customer satisfaction, Warranty, R/1000 and CPU). Also they are needed to know the present status compared to the target. In addition, they must be aware of the problem causing which current state does not meet the goal. To find a way to improve the indicators of quality, Process coach together with Support function consider the priority, and use proper tools and methods.