During the 1990s, the resource-based view (also known as the resource-advantage theory) of the firm became the dominant paradigm. It is an inter-disciplinary approach that represents a substantial shift in thinking. It focuses attention on an organisation's internal resources as a means of organising processes and obtaining a competitive advantage. The resource-based view suggests that organisations must develop unique, firm-specific core competencies that will allow them to outperform competitors by doing things differently and in a superior manner.
It is essential that the internal analysis provide a frank and open evaluation of the firm's superiority in terms of skills, resources or market position since this will provide the basis for competing over the forthcoming planning period. For this reason, some companies engage external consultants, often advertising or marketing agencies, to provide an independent assessment of the firms capabilities and resources.