Explanation
According to the PMBOK Guide, the project manager is responsible for conducting the procurements, which includes planning, conducting, controlling, and closing the procurement activities1. One of the key processes in conducting procurements is source selection, which involves evaluating the proposals or bids from potential suppliers and selecting the most qualified one2. The project manager should use fair and transparent criteria to evaluate the suppliers, such as their experience, skills, technical approach, quality, cost, schedule, and risk3.
The project manager should not prioritize or favor any supplier based on the sponsor's recommendation, the previous relationship with the company, or the contracting area's preference. The project manager should act ethically and professionally in the procurement process and ensure that the best interests of the project and the organization are met4. References: 1: PMBOK Guide, 6th edition, p. 459 2: PMBOK Guide, 6th edition, p. 476 3: PMBOK Guide, 6th edition, p. 477 4: PMI Code of Ethics and Professional Conduct, Section 2.2.1