A Guide to the Project Management Body Of Knowledge (PMBOK® Guide), Fourth Edition

Project Procurement Management includes the processes necessary to purchase or acquire products, services, or results needed from outside the project team. The organization can be either the buyer or seller of the products, services, or results of a project.
Project Procurement Management includes the contract management and change control processes required to develop and administer contracts or purchase orders issued by authorized project team members.
Project Procurement Management also includes administering any contract issued by an outside organization (the buyer) that is acquiring the project from the performing organization (the seller), and administering contractual obligations placed on the project team by the contract.
Figure 12-1 provides an overview of the Project Procurement Management processes which include the following:
12.1 Plan Procurements The process of documenting project purchasing decisions, specifying the approach, and identifying potential sellers.
12.2 Conduct Procurements The process of obtaining seller responses, selecting a seller, and awarding a contract.
12.3 Administer Procurements The process of managing procurement relationships, monitoring contract performance, and making changes and corrections as needed.
12.4 Close Procurements The process of completing each project procurement.
These processes interact with each other and with the processes in the other Knowledge Areas. Each process can involve effort from a group or person, based on the requirements of the project. Each process occurs at least once in every project and occurs in one or more of the project phases, if the project is divided into phases. Although the processes are...