This part of ISO/TR 13387 is intended to provide guidance to designers, regulators and fire safety professionals on the use of engineering methods for the prediction of movement of fire effluents within and outside of a building. It is not intended as a detailed design guide, but could be used as the basis for the development of such a guide. This part of ISO/TR 13387 also provides a framework for critically reviewing the suitability of an engineering method for assessing the potential for movement of fire effluent during the course of fire. The document also provides guidance on the means to assess the effectiveness of fire safety measures meant to reduce the adverse effects of movement of fire effluents. The methods for calculating the effects of design fires for use in the design and assessment of fire safety of a building are also addressed.