Its based on the principle that using a purpose-built function in a cell is more transparent, reliable, flexible and accurate than an overly long Excel formula.
This principle has been extended to a comprehensive projections functions that project cashflows and accruals with a high degree of daycount accuracy.
Up to 500 or so functions in C++ do the dirty work of projecting costs and revenues, coping with time periods, growth etc.
As a Business Functions user you also have access to the templates, all built with Business Functions.Version 1.41 merges all the editions of BF into a single package, which means that for the first time the Real Estate, Banking and Petroleum functions are free. It also allows partial view of C++ code via the Function Finder, and includes our consolidation tool Cashflow Administrator. This is a toolkit for industry-strength modeling, and is completely free.