Most of large companies have allocated plenty of resources to knowledge management because they believe Knowledge and its management is a
foundation for creating competitive advantages in organizations. However, implementing knowledge management projects in an organization requires essential organizational changes.In this paper, success factors of knowledge management are extracted from literature review on papers represented between 1997 and 2009.Then the factors are categorized and effective factors in each
group are determined.Results are finalized by a panel of experts in Iran and effective and critical success factors of knowledge management are determined for Iranian organizations.Final results show that from 12 effective success factors of knowledge management, four one’s including knowledge strategy, management support, motivational encouragements and strong technical infrastructure are critical ones. It is obvious that continuous attention of management to these factors and appropriate investment are vital for the success of knowledge management in organizations
