  We address the problem of a participatory decision-making process where a
shared priority list of alternatives has to be obtained while avoiding
inconsistent decisions. An agent-based model (ABM) is proposed to mimic this
process in different social networks of stakeholders who interact according to
an opinion dynamics model. Simulations' results show the efficacy of
interaction in finding a transitive and, above all, shared decision. These
findings are in agreement with real participation experiences regarding
transport planning decisions and can give useful suggestions on how to plan an
effective participation process for sustainable policy-making based on opinion
consensus.
