Setting up a bill of materials (BOM)
When to set up a bill of materials
                                                
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                                                    Open the Material Class window in one of the following ways: - On the ribbon, from Codes group on the Data tab, click Bill of Materials.
- In classic view, select Database menu > Bill of Materials.
- From the spreadsheet, right-click a material class, and then click Edit Material Class from the shortcut menu.
 - On the spreadsheet, right-click the material class, and then click Edit Material Class on the shortcut menu.
 
- If you opened the Bill of Materials window from the Data tab (or in classic view, the Database menu), select the material class you want to change, and then click [Edit].
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                                                    Make changes as needed. The source option indicates where the material class showing in the window is stored. Changes you make to a standard database material class do not affect the estimate. Likewise, changes you make to an estimate material class do not affect the standard database. - 
                                                            To change the material class name, click [Rename], and then enter the new name in the Material class field. For more information, click  on the title bar of the window, and then click a field or button. on the title bar of the window, and then click a field or button.
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                                                            To add a new Address Book entry for a vendor or subcontractor, in the Default sub/vendor box, type the name of the new vendor, and then press [Enter]. At the message asking if you want to add the name to the Address Book, click [Yes], and then add the information for the new vendor in the Company Edit dialog box. Note: Be sure to save the address record before closing the Company Edit dialog box. 
 
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- When you finish changing the material class, click [OK] to save it.
- Change other material classes in the same manner.- You can click  to choose from a list of existing material classes, or scroll through the material classes using [<<] and [>>]. to choose from a list of existing material classes, or scroll through the material classes using [<<] and [>>].
- If you opened the material class window from the spreadsheet, you can use Source to change material classes in either the standard database or the estimate.
 
- You can click 
- When you finish, click [Close].