How You Manage Work Order Operation Items

The Work Order Operation Items are also referred to as materials or components. The Work Order Operations Items contain information about the operation item requirements for the Work Order Operations.

The Edit Operation Item action helps you do the following:

• Add operation items

• Edit operation item details

• Delete operation items

• View and replace operation items with substitutes

Note: Work order scaling for operation items is supported in process manufacturing.

The following table lists the attributes of the work order operation items:

Name	Description
Operation Sequence Number	Represents the operation sequence number where the operation item is required.
Material Sequence Number	Represents a unique sequence assigned to the operation item.
Operation Item	Identifies the item required to perform the operation. Note: For process work orders, an output item can't be referenced as an input item.
Quantity Per Product	Represents the quantity required to manufacture per unit of the product. Note: This attribute is currently supported for only discrete manufacturing.
UOM	Represents the unit of measure of the quantity. It is always the primary unit of measure of the item.
Secondary Quantity	The secondary quantity of the operation item required in an operation. The field is displayed only when the item is set up as a dual unit of measure item. You can enter either the primary/transactional quantity or secondary quantity, and the application will automatically calculate the other based on the predefined UOM conversion. Note: Secondary Quantity is applicable only to process work orders.
Secondary UOM	The secondary unit of measure of the operation item quantity. It's defaulted to the item's secondary unit of measure and can't be updated. Note: Secondary UOM is applicable only to process work orders.
Inverse	Represents the inverse of the Quantity Per Product. This is applicable when the material Quantity Per Product is fractional but its inverse is an integer. Note: This attribute is currently supported for only discrete manufacturing.
Basis	Quantity consumption can be either Fixed or Variable, indicating constant or proportional usage of the material with respect to the work order product quantity.
Yield	Represents the factor to calculate the required quantity of the operation item to accommodate component wastage. The value of yield must be 0 lesser than yield lesser than or equal to 1. However, yield value greater than 1 is allowed with a warning message. Based on the plant parameter Include component yield in material requirements, the yield is considered in the calculation of the required quantity.
Required Quantity	Represents the operation item quantity required to manufacture the work order quantity. This is calculated and defaulted from the Quantity Per Product depending on the Basis type as follows: If Basis is equal to Fixed, the Required Quantity is equal to Quantity Per Product divided by Yield. If Basis is Variable, the Required Quantity is Quantity Per Product multiplied by Work Order Quantity divided by Yield
Required Date	Represents the date when the materials are required to perform the operation. The required date must not be outside the operation start and completion dates.
Supply Type	Controls how the materials are consumed in the work orders. The hierarchy to default the supply type is in the following order: Default operation item's supply type with work order header supply type if it's not equal to Based on Work Definition. Default from item setup if the header supply type is Based on Work Definition. Default to Push if it's not present in item setup. You can update the default value. A list of supply types and their uses: Assembly pull: The material is backflushed when the product is completed into inventory. Operation pull: The material is backflushed when a subsequent count point operation is completed. Push: The material is manually issued. Bulk: Bulk materials requirement can be viewed. These materials aren't automatically backflushed or defaulted while manually issuing the materials. Supplier: Represents the materials supplied by supplier. These materials aren't automatically backflushed or defaulted while manually issuing the materials. Note: For operation items with material transaction enabled as N in item setup, the supply type must be Bulk.
Supply Subinventory	The supply subinventory from which the material is supplied. The hierarchy to default the supply subinventory is in the following order: work definition, item definition, plant parameter. You can update the default value.
Supply Locator	The supply locator from which the material is supplied. The hierarchy to default the supply locator is in the following order: work definition, item definition, plant parameter. You can update the default value.
Include In Planning	Indicates whether this operation item requirement must be considered by planning run for planning its supply.
Issued Quantity	Represents the net issued quantity of the operation item.
Open Quantity	Represents the quantity that's yet to be issued.
On Hand Quantity	Represents the quantity available in Inventory as on hand balance at plant level.
Allocated Quantity	Quantity of materials allocated to the work order during the picking process when a movement request is created for a work order operation item.
Picked Quantity	Quantity of materials that's picked when the pick slip is confirmed and is issued either directly to the work order or is moved to the staging subinventory.

You can now view the item substitutes in the Edit Operation Items user interface. An icon indicating there are substitutes for an item shows whenever substitutes are defined in the item structure. Upon clicking the icon, a new window opens showing all the substitutes and the priority.

You can select to replace any of the substitutes in place of the primary item using the OK button for all unreleased work orders. After the work order is released, you would be able to only view the substitutes but not replace them.