It reduces misunderstandings with customers. When a problem occurs, it is corrected at the root cause. There is a strong Quality Culture due to the Quality System. Increased confidence in workmanship results in a more confident staff. Systems in place allow staff to address problems.
Staff recognize problems as systems or process issues.
Problems are solved, not blamed on someone. A Quality Manual will describe briefly how your Quality System meets the requirements of the standard. Procedures for each of the 20 points of the standard will describe each process. Work Instructions will describe how specific tasks are done. Records will be kept, demonstrating that documented procedures were followed.