When a vendor suggests changes that could improve the project outcome, it is essential to assess these changes carefully. The project manager should view this as an opportunity for improvement. However, before proceeding, it is crucial to perform a risk analysis to understand the potential impacts on the project, including scope, time, cost, and quality. This approach aligns with the PMBOK Guide's emphasis on continuous improvement and risk management as part of project procurement management. : PMBOK Guide - Seventh Edition1 The PMI Guide to Business Analysis2