Many consulting firms use Analytica for building quantitative decision models for their clients. A common reason is given by Robert Brown III, President of Decision Insights, “I estimate that the time I spend writing Analytica models is one quarter to one half of that devoted to similarly complex spreadsheets.” Many consultants use Analytica’s influence diagrams in discussions with clients and stakeholders. They find influence diagrams a great tool to facilitate discussion as they identify key decisions, objectives, and uncertainties. It encourages participants’ buy-in to the modeling process and its results.