In terms of the sociological structure, basically using consultancy services in organizations of country is essentially limited to specific issues. While, using advisory services in various fields including economic, managerial, technical, marketing, financial, Human resources and etc. are different dimensions that any economic activist needs in the world nowadays and in national business sector, and especially in international sector.
It cannot be expected that managers at all levels having required knowledge, insights and skills and cannot be expected that managers will always have a treasure of successful and unsuccessful managerial experiences in their personal records. Today in the world, executives using consultants to meet this need.
Advisers can help managers in difficult situations by using experiences from different firms and by insights in identifying issues and suggesting solutions, and as they are free to mention shortcomings and introduce opportunities to institutions. And complex and critical of organizations and accompany them in realizing their aspirations.