Collaborative spatial decision making (CSDM) involves multiple stakeholders
making strategic decisions based on spatial data. Current CSDM tools have been
exploring different ways to integrate spatial data with collaboration,
distribution and mobility. Notably, decision-making support has not seen the
same level of attention. This paper discusses the challenges raised by the
integration of decision-making models in CSDM tools. We review a large
collection of decision-making models using three different views: sequential,
dynamic and continuous. From this review we derive a conceptual model and a set
of functional requirements necessary to integrate decision-making support in
CSDM tools. The conceptual model highlights the importance of several functions
in decision-making processes: representing problems, finding alternatives and
making choices (sequential view); classification and communication (dynamic
view); and perception, comprehension and projection (continuous view). The
paper also describes a prototype developed to validate the model