| # Bill of Material (tibom1110m000) Use this session to define a bill of material (BOM) for manufactured items or purchased items. The component items of a manufactured item are listed in the BOM lines. Each BOM line contains information about the position of the component item in the BOM, the required quantity, the expiry date of the component item, and so on. The component items can be either manufactured or purchased. You can enter and maintain a BOM line directly in the Bill of Material (tibom1110m000) overview session. To change more details, you must double-click the BOM line, after which the Bill of Material (tibom1110m000) details session starts. If you want to define an BOM for an item, you must first define the item in the Items - General (tcibd0501m000) session, as well as in the Items - Production (tiipd0101m000) session. You can choose in the View menu how the BOM is presented, and, consequently, how the component items are entered: By position. By operation and position. In the Bill of Material Parameters (tibom0100m000) session you can determine in which view the BOM is presented when you start the session. Select in the View BOM By field whether you want to view the BOM by Item, or by Operation. Replacing outdated components To replace an outdated component, proceed as follows: Insert a BOM line with the same BOM position number as the outdated component. Enter the date when the switch must occur in the Expiry Date field for the outdated component. Enter the same date in the Effective Date field for the new component. If the outdated component is not used anymore in any BOM, you must set the item's last allowed order date in the Items - Ordering (tcibd2500m000) session. If the last allowed order date is specified by warehouse, you must use the Warehouse - Item (whwmd2510m000) session. If the Use Up and Alternative Materials check box is selected in the Implemented Software Components (tccom0100s000) session, and you enter a new component with the same BOM position number as an existing component, ERP LN automatically inserts the outdated material as use-up material in the Use Up and Alternative Materials (tibom0150m000) session. Performance aspects The settings in this session could affect system performance and database growth. For more information, refer to the following topics: Number of BOM levels Floor stock Phantoms Material for multiple operations Related topics Structure of a multilevel BOM Structure of a single-level BOM Structure of a summarized BOM Calculating net quantity Scrap and yield Link materials to operations Phantoms Overview of reference designators Procedure for linking reference designators in the BOM Labels in Manufacturing Integration Manufacturing and Document Management To use up remaining stock of outdated items Alternative materials in BOMs Item Selection The manufactured item or purchased item for which you want to display or maintain the bill of material. The first segment is used for the project code, and the second is used for the item code. Engineering Item Revision A version or revised version of an engineering item (E-item) or a revision-controlled item, that is, an item linked to an E-item. Several revisions of an E-item can exist. Example E-item: Mountain bike E-MB01
Revision | Description | Status
--- | --- | ---
A1 | Draft drawing of bike | Not released
A2 | Drawing of bike | Not released
A3 | Parent E-item of bike MB01 | Released
A4 | Obsolete bike | Canceled
BOM Qty The number of manufactured items to which a bill of materials (BOM) applies. The BOM quantity enables you to specify very small item quantities as BOM components. Example You need very small amounts of certain colors to mix one liter of a specific paint, Cotton White. Therefore, a BOM quantity of 1000 liter is defined. The component quantities for the paint can then be as follows:
Paint Cotton White, 1000 liter:
White | 999 liter
Yellow | 0.6 liter
Red | 0.2 liter
Blue | 0.2 liter
You must determine the BOM quantity in the Items - Production (tiipd0101m000) session. The BOM quantity enables you to specify very small item quantities as bill of material components. You might want to do this, for example, if you are creating a bill of material for a chemical dilution. Example You want to make a millionth part salt dilution. If the dilution's inventory unit is liters, you can specify a BOM for one liter, and a component item of one milligram of salt. However, one milligram could be too small to be measured accurately. It is more practical to specify a bill of material for a BOM quantity of 1000 liters, so the component item will be one gram of salt. BOM Qty The unit in which the inventory is defined, for example, grams or meters. Order Lead Time The production time of an item expressed in hours or days, based on the lead time elements as defined in the routing operations. You can determine the order lead time by clicking Update Order Lead Time in the Specific menu of this session, or clicking Update Order Lead Time in the Items - Production (tiipd0101m000) details session. Position The component's position number. By default, ERP LN shows the last position number used, plus 10. This procedure provides the sequence 10, 20, 30, and so on. The numbering of positions is unrestricted. For best results, you must use the default values so you can use intermediate numbers to insert components. The maximum position number of a component item is 9999. Sequence Number The BOM sequence number is a subdivision of the component item's BOM position number. If you create orders for a manufactured item and a BOM line has more than one sequence number, ERP LN uses the sequence number that is currently valid. If multiple sequence numbers are valid, only the material with the lowest sequence number is taken into account. Item The component item that is part of the manufactured item. The components must be items of the Purchased item type or the Manufactured item type. The component must be defined in the Items - General (tcibd0501m000) session. Operation The operation for which operation the material of the BOM line is issued to the shop floor. If you enter zero (0), you can use the BOM Line - Material-Routing Relationships (tibom0140m000) session to determine on which operation the material is issued. If you enter a value other than zero (0), for example, 10, the material is issued at operation 10. This operation applies to all routings that are defined for the manufactured item. If the operation does not exist for the manufactured item's routing(s), the BOM line material is issued at the first operation of the routing. Note To avoid entering the code of a nonexistent operation, you are advised use the zoom function for this field and select an operation from the Routing Operations (tirou1102m000) session. Performance aspects The setting of this field could affect system performance and database growth. For more information, refer to Material for multiple operations. Related topics Link materials to operations Warehouse The warehouse where the component is stored and where the allocation for a production order is made. Note If the component is a phantom, and you select the Inherit Warehouse if Parent Item is a Phantom check box, ERP LN allocates the requirement for the component in the warehouse of the component's parent item. WMS Controlled If this check box is selected, you defined in the Warehouses (tcmcs0503m000) session that an integration with a Warehouse Management System (WMS) exists. The value of the Lot Selection field in this session must be the same as in the used WMS. Lot Selection This field is applicable for lot-controlled items. The values Any, Same, or Specific regard the special conditions for the delivery of lot items on order lines. The values also determine the way lot numbers are assigned. Length This field can be used, together with the Width field and number of units, to calculate the net quantity. The net quantity is the Length field multiplied by the number of units and multiplied by the Width field, if applicable. In the Print Production Order Documents (tisfc0408m000) session, you can only print a sawing list if you have entered the Length field for the given component. If you have entered both the Length field and the Width field, you can print a cutting list. Related topics Calculating net quantity Width This field can be used, together with the Length field and number of units, to calculate the net quantity. The net quantity is the Length field multiplied by the number of units and multiplied by the Width field, if applicable. If you have entered both the Length field and the Width field, you can print a cutting list in the Print Production Order Documents (tisfc0408m000) session. Related topics Calculating net quantity Number of Units The number of times that the required quantity of the material, specified in the Length field and/or the Width field, appears in the product. Related topics Calculating net quantity Net Quantity The amount of a component item used in the manufactured item. To calculate this amount, multiply the number of units by the value in the Length field and the value in the Width field. For example, if you specify ten units of a component that is 2 cm long and 3 cm wide, the net quantity is 60 (10*2*3). If the width is not specified, the net quantity is 20. Note If a negative quantity is shown, the production of a manufactured item results in a by-product. This by-product is entered in the bill of material with a negative quantity, which is used to calculate the gross material requirement. Quantity-independent lines If the BOM lines are quantity independent, a zero is displayed in this field. Related topics Calculating net quantity Scrap and yield Scrap Factor % Recording a scrap factor prevents shortages in production. The scrap factor is expressed as a percentage loss. A scrap factor of 5% means that ERP LN will allocate 5% more of a component for a production order (gross material requirement). Scrap is an extra loss in addition to the loss caused by the yield being less than 100%. If you generate the BOM from an engineering BOM, the scrap factor and scrap quantity values will also be copied. However, these values will only be copied if the sequence number is the only thing changed, for example, wheel 10/1 to wheel 10/2. If there is a new item on the BOM line, for example, wheel to spare wheel, the scrap data will not be copied. In this case, the scrap quantity and scrap factor will be zero (0). Related topics Scrap and yield Scrap Quantity Unusable material or rejects of intermediate products, for example, because of faulty components, or products lost in cutting or sawing operations. The gross material requirements and/or an operation's input quantity must be increased to account for anticipated scrap. In the BOM, you can define scrap as a percentage of the net material requirements, which is the scrap factor, and as a fixed quantity, which is the scrap quantity. A scrap quantity is mostly used to define the amount of material that is lost every time when you start producing, for example, to test the equipment. For an operation, you can only define the scrap as a fixed quantity. The quantity of material that will be lost during production. The quantity is a fixed quantity that is independent to the quantity produced. Recording a scrap quantity prevents shortages in production. Scrap is an extra loss in addition to the loss caused by the yield being less than 100%. If you generate the BOM from an engineering BOM, the scrap factor and scrap quantity values will also be copied. However, these values will only be copied if the sequence number is the only thing changed, for example, wheel 10/1 to wheel 10/2. If a new item exist on the BOM line, for example, wheel to spare wheel, the scrap data will not be copied, In this case scrap quantity and scrap factor will be 0. Related topics Scrap and yield Effective Change Order The change order that defines the effective date of the BOM line. Effective Date The effective date and expiry date determine the validity period for the component. The effective date indicates when the component can be used in the manufactured item. If the Link with EDM check box in the Bill of Material (tibom1110m000) details session is selected, the effective date is derived from the Effective Date field of the engineering item's revision. By using the effective date and expiry dates, ERP LN can save historical data about the structure of a product without affecting production. If the production date for the item falls outside the validity period, ERP LN will not allocate any inventory or material requirements for the component. Related topics Effective date of materials and operations Expiry Date The effective date and expiry date determine the validity period for the component. The expiry date indicates when the component can no longer be used in the manufactured item. By using the effective date and expiry dates, ERP LN can save historical data about the structure of a product without this data affecting production. If the production date for the item falls outside the validity period, ERP LN will not allocate any inventory or material requirements for the component. The latest possible expiry date is 19 January, 2038. If you do not enter an expiry date, ERP LN automatically sets the expiry date to 01/19/38. Related topics Effective date of materials and operations Expiry Change Order The change order that defines the expiry date of the BOM line. First Allowed Order Date The value of the First Allowed Order Date field in the Items - Ordering (tcibd2500m000) session. Last Allowed Order Date The value of the Last allowed Order Date field in the Items - Ordering (tcibd2500m000) session. Phantom If the component item is defined as a phantom in the Items - Production (tiipd0101m000) session, ERP LN will select this check box. You can override that value here. You can use phantom items to record technical information about the product structure or to carry out cost-price calculations. Note If the component item is a phantom, you cannot define alternative materials. Performance aspects The setting of this field could affect system performance and database growth. For more information, refer to Phantoms. Related topics Phantoms Use Phantom Inventory If this check box is selected, ERP LN checks if any phantom inventory is available. If the phantom item is available in inventory, and the quantity is sufficient, this inventory is used as component in the production order. If no phantom inventory is available, or if the quantity is insufficient, the inventory is not used. ERP LN treats the component as a normal phantom item, so the phantom is exploded for the total quantity. Note The phantom stock is always ignored during planning. Related topics Phantoms Print on Order Document If this check box is selected, the BOM component is printed on the order document. Users can specify whether or not they want to print a BOM material on the order document. For example, a user can choose not to print the floor stock in the material list. Link with EDM If this check box is selected, the engineering bill of material is copied to the production bill of material. If you modify this bill of material line, this can cause an inconsistency between the engineering bill of material and the production bill of material. Reference Designators Present If this check box is selected, one or more reference designators are present in the Reference Designators by BOM (tibom0120m000) session. You cannot modify this check box. To view or maintain reference designators, click Reference Designators by BOM. Related topics Overview of reference designators Alternatives Present If this check box is selected, one or more alternative materials are present in the Use Up and Alternative Materials (tibom0150m000) session. You cannot modify the setting of this check box. To view or maintain alternative materials, on the Specific menu, click Use Up and Alternative Materials. Related topics Alternative materials in BOMs Use Up Materials Present If this check box is selected, a use-up material is present in the Use Up and Alternative Materials (tibom0150m000) session. You cannot modify the setting of this check box. To view or maintain use-up materials, on the Specific menu, click Use Up and Alternative Materials. Related topics To use up remaining stock of outdated items Allow Multiple Items If this check box is selected, ERP LN can distribute the net quantity of the material over multiple items. For example, the net quantity can be divided over the use-up material and the standard material or over the standard material and one or more alternative materials. If this check box is cleared, ERP LN issues only a single item for this BOM line for one production order. For examples, refer to To distribute a material requirement over multiple items. Related topics To use up remaining stock of outdated items Alternative materials in BOMs Material-Routing Relations If this check box is selected, material-routing relationships are present for the BOM component. In process by Change Management If this check box is selected, the BOM line is under change management control. If a change order is linked to the BOM, and the change order has not yet been approved, ERP LN selects this check box. In the Change Management (CHM) module you can keep track of the effective and expiry dates of a BOM line according to a defined procedure. Standard Configuration If this check box is selected, the BOM line is part of an item’s standard configuration. The costs for the BOM line are included in the standard cost price. If the Standard Configuration check box is cleared, the BOM line is not part of an item’s standard configuration. The costs for the BOM line are not included in the standard cost price. The Standard Configuration check box in combination with the setting of the Valid check box in the Exceptions (tcuef0105m000) session indicates whether an BOM line is used for a specific effectivity unit. If the Standard Configuration check box is selected, and the Valid check box is cleared for an exception linked to the BOM line, the BOM line will be omitted for a specific effectivity unit or requirement. If the Standard Configuration check box is cleared, and the Valid check box is selected for an exception linked to the BOM line, the BOM line will be added for a specific effectivity unit or requirement. Note If the BOM line has exceptions attached, but you do not want to use the exceptions, for example, for selling spare parts, or for an end item which is not unit-effective, then you can clear this check box. Related topics Overview of unit effectivity Text If this check box is selected, a text is present. Exceptions Present If this check box is selected, this BOM line has exceptions linked to it. Exceptions are part of the unit effectivity concept. Related topics Overview of unit effectivity Supplied by Subcontractor If you subcontract one or more operations, or an item's entire production process, you can choose whether or not to send material to the subcontractor to use for the subcontracted item. If this check box is selected, the material is not sent to the subcontractor, but it is supplied by the subcontractor. Therefore, the material's planning and costing is not taken into account. If this check box is cleared, and the material is linked to a subcontracted operation, the material is sent to the subcontractor. Related topics Overview of subcontracting Actual Revision If the item has a relationship with the engineering item, ERP LN uses this field to display the revision of that engineering item. Use Lead Time Offset If this check box is selected, you can specify the lead-time offset. Lead Time Offset The lead-time offset. ERP LN uses the lead-time offset in capable-to-promise calculations. The date that a component must be available is calculated by subtracting the lead-time offset from the requirement date of the end item. Note You can only type the lead-time offset if the Use Lead Time Offset check box is selected. Lead Time Offset Select Hours or Days as the time unit in which you want to express the lead-time offset. Related topics Component CTP Yield for Fixed Lead Time offsetting The yield that is used in calculations for aggregate planning. When ERP LN plans material requirements by using a fixed lead time, ERP LN uses the Yield for Fixed Lead Time offsetting field, rather than routing data. This process is carried out in the Resource Requirement Planning module. The value that you type in this field must be an estimation of the yield for all operations in the item routing. For example: Yield on operation 10: 90% Yield on operation 20: 80% Yield on operation 30: 90% In this case, the value that you must type in the Yield for Fixed Lead Time offsetting field is .90 * .80 * .90 = 65% Default value 100 Related topics Production lead-time calculation in Enterprise Planning Order planning, an overview Routing Scrap for Fixed Lead Time offsetting The scrap that is used in calculations for aggregate planning. When ERP LN plans material requirements by using a fixed lead time, ERP LN uses the Routing Scrap for Fixed Lead Time offsetting field, rather than routing data. The planning process is carried out in the Resource Requirement Planning module. The value that you type in this field must be an estimation of the scrap for all operations in the item routing. Default value 0 Related topics Production lead-time calculation in Enterprise Planning Order planning, an overview Extra Information If extra information exists about the BOM line, you can find the information in this field. Inherit Warehouse if Parent Item is a Phantom Determines on which warehouse ERP LN allocates the requirements for this component and from which warehouse ERP LN issues the component if the component is a phantom. If this check box is cleared, ERP LN plans the material issue on the warehouse of the phantom item, regardless of whether the item is a phantom item or not. You define this warehouse in the Warehouse field in the Bill of Material (tibom1110m000) session. If this check box is selected, and this component is a phantom item, ERP LN plans the material issue on the warehouse of the parent item of the phantom item. Related topics Direct material supply (DMS) Hard Peg Propagation If a production order is transferred from Enterprise Planning to Shop Floor Control, also hard peg propagation information is transferred, and a specification is generated. You can use this field to determine whether a specification must be generated for a material that is not supplied by Enterprise Planning, but determined in Shop Floor Control. Combined Ownership If this check box is selected,, and you create an order, the material's owner will be the same as the parent item's owner. Ownership Ownership Exceptions Copy... Detect Loops in Bill of Material Replace Item in Bill of Material Level Up Level Down Show All Lines Item - Routings Show Effective Lines Copy Standard Product Structure to Customized Structure Check Unit Effective Supply Consistency Phantom Routing Relationships Where-used BOM Components View Tree Click View Tree to view and maintain the multi-level BOM in the GBF browser. Material-Routing Relationships Click to check whether material-routing relations are present for the BOM line. Update Order Lead Time Click to start the Update Order Lead Times (tirou1202m000) session. The value of the Order Lead Time field is updated. Reference Designators by BOM Click to start the Reference Designators by BOM (tibom0120m000) session, in which you can define and maintain reference designators for a BOM line. Use Up and Alternative Materials Click to start the Use Up and Alternative Materials (tibom0150m000) session to maintain a use-up material or alternative materials. Copy Item to Alternative Materials Click to start the Copy Item to Alternative Materials (tibom0250m000) session to define more use-up materials or alternative materials. Check Use-up Material Definitions Click to start the Check Use-up Material Definitions (tibom0251m000) session. Remove Used Up Materials from Alternative Materials Click to start the Remove Used Up Materials from Alternative Materials (tibom0252m000) session. |