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variable size item


tell me all nessary settings for maintain one mtl as variable size item in material BOM.


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    Former Member
    Sep 01, 2008 at 07:19 AM


    Pls find the required details about Variable Size item maintaining in BOM:

    Variable-Size Items

    If you want different-sized sections of a material (raw material) to be represented by one material number in BOM items, you use this item category.

    Before you start

    A valid material master record with a material type that supports stock must exist in the plant you select.

    Special functions

    On the Detail Screen: Variable-Size Item Data, the system automatically calculates the quantity of the variable-size item required from the sizes and any formulas entered.

    Different-sized sections of a material (for example, sheet metal) can be stored under one material number.

    You can group together all alternative variable-size items into an alternative item group.

    You can use the discontinuation control function to transfer dependent requirements to a follow-up item if they are no longer covered by sufficient stock.

    Variable-Size Item Data

    On the Variable-Size Item Data screen, you maintain data that is specific to variable-size items.

    If you enter variable-size item data, the system calculates the quantity. All calculations in BOMs are based on the international system of units.

    This is the data you can maintain specifically for variable-size items:

    · Size (1 to 3)

    These three fields contain the dimensions of the variable-size item. The system uses these dimensions as variables in the selected formula to calculate the variable-size item quantity.

    · Size unit

    This field describes the unit for sizes 1 to 3.

    If you do not enter a unit for variable-size item sizes 1 to 3, the system uses the default unit of measure that you defined when you configured your system.

    The dimension of the size unit and the dimension of the unit of the variable-size item quantity are related (see the example below).

    The following table contains the variable-size item data used to calculate the quantity for a sheet of metal.

    Variable-Size Item Data for a Sheet of Metal




    Size unit









    If you do not enter a formula, the system calculates the quantity for the variable-size item according to the standard formula:

    Size 1 * Size 2

    The result has the dimension area:

    200 MM * 300 MM = 60,000 MM2 (square millimeters)

    The variable-size item unit must have the dimension area (MM2, CM2, or M2) or you must maintain conversion factors in the material master record.

    · Formula key

    This key represents the algorithm for calculating the variable-size item quantity.

    In Customizing for Production, you can define formulas by choosing Bill of Material ® Item Data ® Define formulas for variable-size items. You can also use the formulas defined in the standard system.

    You can enter units of measure for calculating the variable-size item quantity with a formula. The calculation always uses unit for the dimension from the international system of units (for example, M3 for a volume in cubic meters). These units are defined in Customizing (dimensions for units of measurement).

    · Number

    This entry is the number of pieces of the variable-size item required for the assembly. This entry is used for calculating raw material requirements.

    The unit PC(piece) is defined as a default in the standard system, in Customizing for Production, under Bill of Material ® Control Data for Bills of Material ® Define modification parameters.

    · Variable-size item quantity

    The system uses the sizes you enter and a variable-size item formula to calculate the quantity of the variable-size item.

    If you do not enter a formula, the variable-size item quantity is either the product of sizes 1 and 2 (for dimension area) or the product of sizes 1, 2, and 3 (for dimension volume).

    The variable-size item quantity is used for calculating raw material requirements:

    Raw material requirement =

    Number of variable-size items * Variable-size item quantity * Required quantity





    Base quantity

    · Component Unit of Measure for Variable-Size Item

    · This unit describes the unit of measure for the quantity of a variable-size item.

    · In the material master record, you can enter alternative units to the base unit of measure.

    The only alternative unit used in BOMs is the unit of issue.

    · Possible values are:

    · Base unit of measure

    · Unit of issue

    · Units of measure that have the same dimension as the base unit of measure or the unit of issue

    · If you do not enter a unit, the system proposes a unit from the material master record, if the item has a material master record.

    If a unit of issue is entered on the storage screen of the material master, the system copies this unit to the BOM. Otherwise, the system copies the base unit of measure to the BOM.

    Planning Variable-Size Items

    1.Call up the order in change mode, and choose the operation overview.

    2.Select the operations, for which you want to plan material, and call up the component overview. To do this, you have the following options:

    - To display the material components for all order operations, call up the Component overview.

    - To display the material components for a particular operation, select the required operation and then call up the Component overview.

    3.Enter Variable-size item as the item category. Enter all the variable-size items required, together with any further information needed for the operation in the list.

    If you are on the overview screen for the material components of all the order operations, you must also enter the operation for which each material is being planned. However, if there is only one operation in this order, the material is automatically assigned to this operation.

    Choose Continue.

    4.Select the variable-size items for which you want to specify additional data. Choose General (Detail view: General data) ® Variable-size item data.

    5.Make all the necessary entries. Use Next component to reach the variable-size item data screen for the next variable-size item selected.

    6.To return to the component overview, choose Goto ® Back.

    7.Save the order.

    Hope this helps.



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  • Sep 01, 2008 at 07:23 AM


    Consider an item A with 'kg' as base Unit Of Measurement(UOM) and 'm3' as stock keeping/issue unit. Conversion factor is 1kg = 2.4 m3.

    In the BOM of 'B' ,number of A required are specified (say 5).

    Specify the 3 variable dimensions i.e. length, width & thickness- say 2000mm X 3000mm X 4mm = 0.024 m3

    As per BOM - 'B' , the quantity of A required is 0.024 X 5 = 0.120 m3

    If a production Order is released for 15 numbers of 'B' , the quantity of variable size unit will be 1.20 m3.

    You can change the length, width or thickness in the production order & check the resulting variable size item quantity. At the same time this requirement can be seen in 'kg' in stock/requirement list.

    Please refer this thread,

    Help Understanding the item category "R" in BOM's:



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    Former Member
    Sep 01, 2008 at 07:24 AM


    Super BOM:


    The bill of material (BOM) of a configurable material contains all the components that are required to manufacture the material. The BOM contains components that are only used in specific variants (variant parts), as well as components that are used in all variants (non-variable parts).

    This is why BOMs for configurable materials are known as super BOMs.


    When you maintain BOMs for configurable materials, there are additional functions:

    You can assign object dependencies to the BOM items for a configurable material.

    You can assign the following dependency types to BOM items:

    Precondition :

    This is used to show / hide characteristics defined while Variant Configuartion with certain predefined conditions.

    Selection conditions

    To ensure that variant parts are selected when they are needed in a variant, you assign selection conditions to the variant parts.

    Procedures / Actions ( However Actions are obsolete now)

    You can use procedures and actions to change field values in a BOM item, such as the component quantity.

    For more details of Super BOM go to the following Link :

    Hope you will get some idea

    Thanks and regards


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    Former Member
    Sep 01, 2008 at 07:26 AM


    1. Enter the material for which you want to create BOM, Plan and BOM usage.

    2. Select the item category "R", enter the component. Now you will be taken to the "Variable item data" screen.

    3. Enter the datas of Size 1, 2 & 3 (as required) and the unit of the size & number. System will calculate the "Qty of var- size item" in the unit assigned to the basic data of the material master of the component.

    4. Save

    You can change the unit of the variable size item as per your requirement in OS28

    Creating variable size item Formula in OS15

    For Ex: To calculate vol. of rectangle

    Vol. of rect = length * breadth * height

    1. Enter a reference as "R1" in first "Formula" column.

    2. Enter the above formula as "ROMS1 * ROMS2 * ROMS3" where ROMS1, ROMS2,ROMS3 represents the field name of size1, size2 and size 3 in the BOM item screen.

    3.Select the dimension as "VOLUME" from "Dimension" and enter the "Formula text" for referance.

    As an example, create your required formula.

    Hope this helps



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