An important set of studies has been developed in the corporate governance field; a research area has been created containing different subjects: agency theory, governance models and structures, governance impact on company's performance or governance failures. While corporation is the main scope of these researches, corporations don't exist as independent structures. One hypothesis we consider is that corporate governance theories are not entirely relevant for chains of companies, except the case of asymmetric supply chains. For equilibrated supply chains the focus of corporate governance for only one corporation, one link of the chain, seems to be obsolete as long the interests of chain stakeholders are different and they act together for attaining their goals. Let's consider management as a system running current activities of a corporation. Corporate governance is a higher ranked system, by establishing rules for management. It is also partially an external system, by ensuring stakeholders' interests are achieved without their direct involvement within the firm. Contrary to all reasons, if corporations within a chain have the same power and very efficient governance systems, the chain would generate poorer results than any other competitor chain with different configuration. Why? Business means nowadays dependence among links. For creating a chain cost disadvantage, one powerful corporation from the chain is enough to be governed or directed to good results only for chain local stakeholders. In order to face this problem, supply chain management processes, which ensure collaboration for all chain partners have been developed. Within the article we consider the necessity of higher ranked systems similar to corporate governance system for supply chain management. For identifying forms of supply chain governance, a literature review study was performed. Three supply chain models were identified. Supply chain governance models and researches are at the beginning, even if supply chain management is a common business practice.
