This document discusses organizational culture and managing change within organizations. It defines organizational culture as shared values, beliefs, and assumptions that guide how employees act. It describes how culture forms through selection, socialization, and leadership. The document contrasts strong and weak cultures and discusses how culture can help or hinder change efforts. It introduces Lewin's three-step change model of unfreezing, moving, and refreezing status quo. It also discusses sources of resistance to change at the individual and organizational level and provides suggestions for overcoming resistance and managing the change process.