This document provides an overview of contingent worker functionality in Oracle R12. It discusses how contingent workers can be set up and integrated with projects, purchasing, and timekeeping applications. Key points covered include how to configure purchase orders for contingent labor, set up contingent workers in HR, enter time in Oracle Time and Labor against projects, create receipts in purchasing, and interface labor costs to projects. The document is intended to help users understand the nuances of implementing contingent worker functionality in Oracle R12.