The BatchDesign-Kit is a software system that is aimed to support the development and design of batch processes for the manufacturing of pharmaceuticals and specialty chemicals, by integrating economic and ecological considerations. One of its three subsystems, the Process Assessor deploys techniques and methodologies which allow the rapid generation and evaluation of alternative batch processing schemes. Using a state-transition network as the basic model of the batch process, the Process Assessor allows the simulation of batch process, assessment of materials from the ecological point of view, and the selection of the most appropriate treatment options for the process wastes. This paper gives an overview of the character, structure and facilities of the Process Assessor.