A persistent criticism of policy analysis is that it undermines basic democratic institutions and processes by replacing public participation with expert analysis. Many decision makers shun broader participation because of the complexity of an issue or the cost, uncertainty, and delay often associated with public involvement. This article presents a model for the systematic inclusion of public input into relatively complex public policy decisions. It outlines two determinants of success in public participation efforts: the purpose for public involvement and the nature of the issue, furthermore, it applies the model to two issues in recent Utah history that have involved public participation. Using these principles, decision makers should be able to design and implement public participation strategies that both inform the public about substantive policy questions and improve the quality of the final decision.