If you try to bypass this process and simply instruct users to accept the change then you risk that they will go against the desired change and potentially sabotage the process. It really is important to get users on-board from the outset; prove and sell the change as a positive step. Even if this is not the case and their role changes with increased responsibility and effort, it’s equally important to explain carefully why their role is critical to the rest of the organisation and team players. Unless you ensure people fully understand the benefits then you risk resentment, or people becoming disengaged from the PLM project altogether.