BOM totals for all clean systems that use high purity piping.BOM totals for all the piping isometrics for the clean steam system.BOM for each individual piping isometric.1.2 Purpose of the Bill of MaterialsĪ bill of Materials has different functions depending on which level of the BOM you have and job description you are carrying out.įor example in pipe fitting you could have the following layers:
They also play a role in Materials Requirement Planning (MRP) and Enterprise Resource Planning (ERP) management systems. Bills of Materials are used as documents supporting the assembly process. Items in a subassembly can be parts whose amounts would be counted as natural numbers of pieces or if it is simple materials being used, measurements of length or quantity. This can let the bill of materials look like a tree with the finished good or subassembly as root. The Bill of Materials can be structured in levels indicating all the steps to final completion. A Bill of Materials (BOM) sometimes referred to as the Material Take Off (MTO) lists all the items that go into a finished project or subassembly of that project.
