A stock-flow diagram graphically presents the way any information is passed through an elaborate system. With a stock-flow diagram template, one can easily monitor how internal modeling affects the system. Specifying the equation that allows you to compute the value of a particular variable when you know its beginning value and the values of the other variables in the diagram is known as formally defining variables. Installed Base, for example, is the sum of the initial installed base plus the inflow of People Buying Product. Additional variables may be discovered throughout the definition phase to guarantee that the units of input and output match. Learn more details from this stock-flow diagram, and try to make yours with ease now!