Research Articles

In the tradition of the study of materials flows through society, the Substance Flow Analysis (SFA) method is presented. SFA aims at providing the relevant information for a country"s overall management strategy regarding single substances or coherent groups of substances. This article is dedicated to the presentation of a three-step general framework for SFA-type studies, and elaboration on its first step the systems definition. Attention is given to the definition of the external and internal system boundaries, the categorization of the system"s elements, aspects of materials choice, time, and space, and how these depend on the aim of the conducted study. Moreover, a broader discussion is started on the need for standardization of materials flow studies in general.