That is really the essence and purpose of scope change management to ensure that the initial agreements are met, and that any changes to the expectations are agreed to by the project team and those same stakeholders. Sometimes the Project Manager thinks that scope management means having to tell the customer 'no'. That makes the Project Manager nervous and uncomfortable. However, the good news is that effective scope management is the art of getting the Sponsor to say 'no' . This is very important.
Few projects can foresee every requirement during the analysis process.
Therefore, there are usually changes that need to be introduced during the life cycle. These changes may be very necessary for the solution, and there may be valid business reasons why they should be included. The Project Manager and project team must recognize when these changes are requested. Then they must follow a predefined scope change process. This process ultimately brings the appropriate information to the Project Sponsor for resolution.