You define items in one organization. To distinguish it from others, we call it the Item Master organization. Other organizations (child organizations) refer to the Item Master for item definition. After you define an item in the Item Master, you can assign it to any number of other organizations.
There is no functional or technical difference between the Item Master organization and other organizations. However, for simplicity, Oracle recommends that you limit the Item Master to just an item definition organization.
Oracle also recommends that you do not define multiple item masters. This can make item definition and maintenance confusing. In addition, multiple item masters are distinct entities, with no relationship to each other. You cannot associate items in one item master organization with another item master organization. You cannot copy items across item
master organizations.
To create the item master:
1. Use the Organization window to create the organization you want to use as the Item Master.
2. Use the Organization Parameters window to specify that organization as the Item Master. This is also where you assign child organizations to the Item Master. The item master organization uses itself as the Item Master.

An item is a part or service that you purchase, sell, plan, manufacture, stock, distribute, or prototype. The following Oracle Applications use items:
• Oracle Inventory
• Oracle Purchasing
• Oracle Order Entry

• Oracle Cost Management
• Oracle Bills of Material
• Oracle Work in Process
• Oracle Master Scheduling/MRP
• Oracle Receivables
• Oracle Payables
• Oracle Services
• Oracle Engineering

• Oracle Quality
• Oracle Sales and Marketing

Below diagram describes the basic work that needs to be done before an item is ready to be used in inventory for transaction purpose.

  
 

Oracle Inventory is one of Oracle’s enterprise applications products. Oracle Inventory enables companies to satisfy business needs such as these:
• Defining part numbers
• Modeling organization structures
• Tracking perpetual inventory
• Maintaining accurate on-hand balances
• Planning material replenishment’s
• Forecasting anticipated demand

You can enable the system to send material shortage alerts and shortage notifications when a material shortage occurs in an organization. A material shortage occurs whenever unsatisfied demand exceeds available quantity for incoming supply of material.

Check Shortages: Indicates that the material shortage check is enabled for WIP.

Jobs and Schedules regions:

Released: Indicates that all jobs/schedules with status Released, whose scheduled start date is overdue, are included in the material shortage check. This parameter is separately controlled for jobs and schedules.
Unreleased: Indicates that all jobs/schedules with status Unreleased, whose scheduled start date is overdue, are included in the material shortage check. This parameter is separately controlled for jobs and schedules.
Days Overdue: Indicates how many days can go by after the jobs/schedules start date until jobs/schedules with status Released or Unreleased are included in the material shortage check. This parameter functions only if you checked Released or Unreleased. This parameter is separately controlled for jobs and schedules.
Hold: Indicates that all jobs/schedules with status Hold are included in the material shortage check. This parameter can be separately controlled for jobs and schedules.
Component Is Due subregions:
Based on required date: Indicates that the required date specified for each component will be used to determine whether the open requirement is late. This parameter is separately controlled for jobs and schedules.
If assigned operation is due: Indicates that all discrete jobs or repetitive schedules with a current operation that has assigned open material requirements are included in the material shortage check. This parameter can be separately controlled for jobs and schedules.
If operation before assigned operation is due: Indicates that all discrete jobs or repetitive schedules with a current operation before an operation that has assigned open material requirements are included in the material shortage check. This parameter is separately controlled for jobs and schedules.
Exclusions region:
The shortage check looks at the supply type of components on the job or schedule. The supply type may be Based on Bill or manually overridden when jobs or schedules are created.
Bulk Components: Indicates that components with supply type Bulk will be excluded in the material shortage check.
Supplier Components: Indicates that components supplied by vendor will be excluded in the material shortage check.
Pull Components: Indicates that pull components will be excluded in the material shortage check.

Notify region:
Select who will receive a workflow notification about the material shortage.

Use the Intercompany Relations window to define, query, and update intercompany relations between two operating units in a multi–organization environment. These operating units are either the shipping organization and the selling organization, or the receiving and purchasing organization.
When a sales order is entered in an operating unit, the shipping organization is often part of a separate operating unit, belonging to a separate set of books. Once the sales order is shipped to the customer, the inventory asset account for the shipping organization is credited and the cost of goods sold account is debited. On the other hand, sales revenue must be recognized in the order entry organization. If the two organizations belong to different operating units, the system must perform accounting distributions to record the intercompany revenue, receivable, and payable entries.
Oracle Inventory and Oracle Receivables must be installed before you can define intercompany relations. If Oracle Payables is not installed, the fields in the AP Invoicing for Selling region are not required.