1) A social system is a complex set of relationships within an organization. Employees become part of the organizational culture and social system when they join. There is a dynamic balance called social equilibrium between the interdependent parts of a system. 
2) When minor changes occur, social equilibrium is maintained through adjustments. But major or rapid changes can disrupt the balance until a new equilibrium is reached. Changes are considered functional if they benefit the system, and dysfunctional if they harm it. 
3) Employees psychologically contract to give work and loyalty in exchange for more than just economic rewards, like security and fulfillment. If expectations are met, employees are satisfied and high performing. But if not met, they are dissatisfied and performance