Public procurement is continuing to evolve both conceptually and organizationally. Public procurement professionals have faced a constantly changing environment typified by rapidly emerging technologies, increasing product choice, environment concerns, and the complexities of international and regional trading agreements. Thus, the public procurement system in the federal system is very fragmented; and there exists a great variation in procurement organizational structure, methods, and processes. Economic or market conditions have a great influence over the public procurement system's effort to maximize competition. However, the iron triangle shifts immediately after the procurement program authorization and appropriation stages move to the procurement stage. A sound public procurement system needs to have good procurement laws and regulations. Decentralization occurs when procurement personnel from other functional areas can decide unilaterally on sources of supply or negotiate with suppliers directly.