This chapter investigates the potential of mobile multimedia for group decisions. Decision support systems can be categorized based on the complexity of the decision problem space and group composition. The combination of the dimensions of the problem space and group compositions in mobile environments in terms of time, spatial distribution, and interaction will result in a set of requirements that need to be addressed in different phases of decision process. Mobility analysis of group decision processes leads to the development of appropriate mobile group decision support tools. In this chapter, we explore the different requirements for designing and implementing a collaborative decision support systems.