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.