According to Laurie J. Mullins, organizational behaviour is the study and understanding of individual and group behaviour and patterns of structure in order to help improve organizational performance and effectiveness. Organizational behaviour provide a set of tools that allow people to understand, analyze and describe behaviour in organization, also it allows managers to improve, enhance or change work behaviour so that individuals, groups and the whole organization can achieve their goals. Through the use of the individual, group level and organization system level variables, including communication, perception, leadership, motivation, Organizational behaviour is a crucial factor within organizations, especially to practicing managers. Managers refer to individuals who achieve goals through other people (Robbins and Judge, 2011). It is their job to understand all of the components that are surrounded within the organization as well as make up the organization so as to understand, predict and influence organizational culture. With gaining the knowledge, managers can better understand, predict and influence the dependent variables.
Communication is the “activating force” behind organizational functions such as planning, organizing, staffing, directing and controlling (Gray et al, 1984). Communication is an important factor to practicing managers, where communication is necessary for plans, tasks and achievement of goals. Also, how clear roles and tasks are defined determines how effective and efficient the outcome is going to be. Managers must use one organizational language so that all of the employees are unified and will be able to understand what needs to be done. Some organizations focus on a centralized form of communication, which is the downward communication by which managers assign goals, provide job instructions, inform employees of policies and procedures, point out