You are the ERP integration project manager of an ERP implementation project for a small manufacturing organization. The Director of IT calls you to discuss his interest in enlarging the scope of the project from implementing two ERP software modules to four. After talking for 10 minutes about the additional benefits scope expansion will bring, he pauses and asks for your opinion. On the one hand, such an expansion will mean additional consulting fees for you and your company; on the other hand, you worry about how this might affect the ultimate success of the project.  What do you say?