System dynamics is a very powerful and flexible modeling paradigm that lends itself perfectly to model, simulate and analyze strategic business and public policy issues in any kind of organization. Using the basic stock and flow perspective characteristic for economics and business accounting, a business simulation helps to dynamically explain outcomes and performance while being solidly grounded in operational ("physical") reality. Unlike existing approaches, the Business Simulation library makes use of Modelica's acausal connectors to better distinguish material/mass flows from instantaneous information signal flows (causal connections). The approach has the additional benefit of allowing the modeler to build more compact models in a fast and reliable fashion.