This chapter explains the role that components play within bills of manufacturing and how they are properly set up and used.
What are BOM components?
Components are the materials required by the various processes used to make the item. The list of components is referred to as the item’s “bill of materials.” Component types are as follows:
Subassemblies
A subassembly is a manufactured item that is used as a component within a higher level BOM. Each subassembly has its own BOM (revision, routing and components) and is manufactured separately on its own jobs. See chapter 8, Product Structures (Subassemblies), for details.
Purchased Parts
These are parts that are purchased from an outside supplier to be assembled into the BOM parent.
Raw Materials
These are raw materials that will be processed in some fashion to be incorporated into the BOM parent.
Phantom Assemblies
Phantom assemblies are used to represent sets of components and are typically used with custom manufacturing as product options. A phantom assembly does not have revision or routing specifications. See the Custom Manufacturing guide for details.
Use Speed Entry to facilitate component entry
Components are entered within the Components tab in the Bills of Manufacturing screen. You can use the Speed Entry function to enable rapid selection of components for batch transfer to the main screen.
Assign components to associated routing sequences
Always assign components to the routing Sequence within which they are used. When a job gets generated, components print within associated sequences on the job traveler. Sequence assignment also enables job materials and components to be selectively issued by work center in the Job Issues screen.
You can import components from a CAD program or other source
You can use the File – Data Import – BOM – BOM Components utility to import components from a CAD program or other source. Keep in mind that the components themselves must exist as stock items and that you should when possible edit your source file to assign components to associated routing sequences.
Determining the sort order
The Line No field determines the sort order on the screen and on the job traveler. The program assigns a value in increments of 10 in the order that components are entered.
If you wish to alter the sort order, manually change the Line No value as needed. After the sort order is finalized, you can then click the Renumber Components icon to renumber the sort order in even increments of 10.
If you wish components to be sorted in item ID order or by description, click the associated column heading to change the sort order displayed in the grid. Then click the Renumber Components icon to preserve that sort order by renumbering the lines in even increments of 10.
The Usage Quantity depends on the BOM type
The component Usage Qty entry depends on the BOM type.
•If the BOM type is ‘BOM’, ‘One-Off’, or ‘Phantom’, enter the net quantity required to make one unit of the parent item.
•If the BOM type is ‘Batch’, enter the net quantity required to make the Batch Size specified in the upper panel.
Select the Fixed Qty when usage never varies with the job quantity
Select the Fixed Qty checkbox when the component usage quantity is always a fixed amount that never varies with the job quantity. For example, a tool or fixture may be used with each job on a one time basis and then disposed, in which case the Fixed Qty would be selected against a Usage Qty of ‘1’.
Use the Overage % when there is a scrap factor
Some materials have a scrap factor where additional material is required beyond the net quantity that goes into the finished item. You can use the Overage % field to specify a percentage over and above the net Usage Qty to account for anticipated scrap. The overage amount is included in costing calculations and is added to the component’s total quantity when a job gets generated.
Using component References
You have the option of attaching multiple References to a component for printing on the job traveler. Circuit board manufacturers, for example, use references to designate component location coordinates.
Each reference consists of two fields. The Reference can be a location coordinate or drawing reference or it can be used for any table that has a one-to-many relationship with the component. The Qty is optional and represents the quantity relative to one unit of the BOM parent.
NOTE: Component references can be imported using the File – Data Import – BOM – BOM References screen.
Use component Job Notes as an alternative to References
Freeform Job Notes can be entered against any component and provide an informal alternative to using References.
Use the Component Replace screen for mass-maintenance
Whenever you wish to mass replace an existing component with another component across all BOMs where it is used, use the Component Replace screen to do this in a batch process.
