12.4. Selecting a Seller (PMBOK, Section 12.4)
Once the sellers have presented their proposals, bids, or quotes (depending on what the buyer requested), their documents are examined so that the project manager can select which sellers are the best choice for the project work. In many instances, price may be the predominant factor for choosing a particular seller—but not always. Other factors besides price may also be taken into consideration:
The cost of an item may not reflect the true cost to the performing organization if the item cannot be delivered in a timely manner. If a seller promises to have a product on site by a specific date and fails to do so, the project can be delayed, costing the organization thousands—or more—in losses.