As previous posts have stated, the decision depends mainly at the situation at the time and the company’s policies. Depending on the stage that the project is at, the project can either be grandfathered with the previous system or if it had to updated for the new changes made. If the project has completed the DHF and Design Transfer, it would seem to make more sense and convenient to consider the project as grandfathered and use the previous system that was set. However, if the project is still in the beginning stages and there is a major change in the Quality System, then the project should follow the new principles. There are many other factors that also need to be taken into consideration when determining which system to follow.