External circumstances and factors that hinder the work of the Organization could not achieve the purpose or means external environment is a problem: for example, how to evaluate potential tourist attractions.
External factors and circumstances that hinder the work of the organization to achieve its objectives. Or the external environment is an issue for the organization to evaluate the potential of tourism.
Factors and external circumstances that inhibit the function of the organization is not objective. Or means of external environment is a problem to the enterprise for the method to evaluate the potential attractions.