Methods, devices and systems are provided for modeling product volume penetration. A system embodiment includes a remote client operably connected to a server, having a number of client files, and an input device. A set of computer executable instructions are operable on the system for projecting product penetration of a product in a client file at a selectable point in time from a product launch or other starting point, based on a set of purchase data for the product. The set of computer executable instructions are operable for receiving the set of purchase data and graphically displaying the set of purchase data as a volume of product sales versus a number of time increments from the starting point. The set of computer executable instructions are further operable for mapping a curvilinear function to the graphically displayed set of purchase data by applying a function expressed as f(t)=s.times.t.sup.B.