Structure has two meanings. First, bills must be properly structured to show stock points, phantoms, and so on.Second, companies whose products have many options usually need to structure their bills into a modular format, creating what are
called “planning bills.” This enables effective forecasting, master scheduling, and customer order promising. (More on this later in this chapter.) Caution: Estimate the work load closely ahead of time.Typically, it takes a good deal of time and effort to develop modular bills. Don’t forget the principle of three knobs: the work to be done,the calendar time in which it needs to be done, and the resources available to do it.