Describe and compare procurement control and methods of purchase and contract control.

Give examples of at least two purchase and contract control methods in use on a project with which you are familiar, or on one that you identify through research.
Make sure your text includes:
A clear, researched, paraphrased definition of procurement control;
Techniques for purchase and contract control; and
Two examples of those control methods in use on projects.
Conclude with an example of a project not currently addressing purchase and contract control, but which could benefit from using such controls.