<Li> An indented BOM that displays the highest - level item closest to the left margin and the components used in that item indented more to the right . </Li> <Li> Modular (planning) BOM </Li> <P> A BOM can also be visually represented by a product structure tree, although they are rarely used in the workplace . For example, one of them is Time - Phased Product Structure where this diagram illustrates the time needed to build or acquire the needed components to assemble the final product . For each product, the time phased product structure shows the sequence and duration of each operation . </P> <P> A configurable bill of materials (CBOM) is a form of BOM used by industries that have multiple options and highly configurable products (e.g. telecom systems, data - center hardware (SANS, servers, etc .), PCs, cars). </P>

Bill of material in production planning and control