Adding a New Operating Unit
The following steps are required to add new operating units to your organizational structure:
1.1 Revise the Organization Structure.
1.2 Define Sets of Books (optional).
1.3 Define Locations.
1.4. Define Organizations and Relationships.
2.1 Define Responsibilities.
2.2 Set Profile Options for Each Responsibility linked to the new Operating Unit.
1.1. HR: Business Group
1.2  HR: Security Option
1.3: HR: User Type (FOR accessing HRMS functions)
1.4  HR: Cross Business Group
2.1. GL: Set of Books(11i)
2.1  GL:%Ledger%  (R12)
2.3  GL: Data Access Set. This profile option to control the ledgers that can be used by Oracle General Ledger.
3.1. MO: Operating Unit
3.2. MO: Security Profile (R12)
3.3. MO: Default Operating Unit
4.1 Tax: Allow Override of Tax Code
4.2 Tax: Invoice Freight as Revenue
4.3 Tax: Inventory Item for Freight
5.1 Sequential Numbering
5.2 INV: Intercompany Currency Conversion
2.3 Run the Replicate Seed Data concurrent program.
3.1 Define Inventory Organization Security.
3.2 Define Intercompany Relations (optional).
3.3 Implement the Application Products.
4.1 Secure Balancing Segment Values (optional).
4.2 Run the Setup Validation Report (recommended).
4.3 Implement Document Sequencing (optional).
4.4 Set the top reporting level (optional).
4.5 Set up conflict domains (optional).
Controlling Secure Access Data Security
You can limit users to information relevant to their organization. For example, you can limit access for order administration clerks to sales orders associated exclusively with their sales office.
Inventory Organization Security by Responsibility
You can specify which inventory organizations are available to users in each responsibility. The Choose Inventory Organization window automatically limits available inventory organizations to those authorized for the current responsibility.
Responsibility Determines Operating Unit
Your responsibility determines which operating unit you access when you use Oracle Applications. When you use Oracle Payables, Receivables, Order Management and Shipping Execution, Purchasing, Projects, and Sales Compensation you see information that is relevant to your operating unit. All transactions you create are automatically assigned to your operating unit.
Sell And Ship Products From Different Legal Entities
Sell from One Legal Entity, Ship from Another Legal Entity
When you enter sales orders, you can choose any inventory organization as the shipping warehouse. The shipping warehouse may be in a different legal entity than the operating unit that enters the sales order, and it may post to a different set of books.
Use the Choose Organization Window to Choose Inventory Organization
After you choose your responsibility to perform materials management functions using Oracle Inventory, Work in Process, Bills of Materials, Master Scheduling/MRP, Capacity, or Purchasing, you must use the Choose Organization window to pick an inventory organization.
Intercompany Accounting
Automatic Intercompany Sales Recognition
Sales orders created and shipped from one legal entity to a different legal entity automatically generate an intercompany invoice to record a sale between the two organizations.
Posting Intercompany Invoices to Different Accounts
You can define different accounts for Trade and Intercompany Cost of Goods Sold and Sales Revenue to eliminate intercompany profit.
Report at the Legal Entity or Set of Books Level
In addition to reporting at the operating unit level, you can report at the legal entity or set of books level.
With Oracle Human Resources, you can define multilevel organization hierarchies, with a business group at the top of each hierarchy. When you define new organizations, they are automatically assigned to the business group associated with your current session. Each organization is part of a business group. The business group is usually the top box on an enterprise organization chart, as shown in below figure.

 
The business group is the largest organization unit you set up in Human Resources to represent your enterprises as an employer. After defining one or more business groups for your enterprise, you set up one or more government reporting entities (GREs) within each business group. The GRE is the organization that federal, state, and local governments recognize as the employer.

Below this level, you represent the groupings in which employees work, such as branches, departments, or sections, by means of internal organizations. To enable the assignment of employees to an internal organization, you classify the internal organization as an HR organization.
You can define external organizations in the same way as internal organizations, so that you can represent organizations that are not part of your enterprise (such as training vendors or tax offices). The major difference between internal and external organizations is that you cannot assign people to an external organization.

Using the accounting, distribution, and materials management functions in Oracle Applications, you define the relationships among inventory organizations, operating units, legal entities, and sets of books to create a multilevel company structure, as shown in below Figure.

 
Legal Entities Post to a Set of Books
Each organization classified as a legal entity identifies a set of books to post accounting transactions.

Operating Units Are Part of a Legal Entity
Each organization classified as an operating unit is associated with a legal entity

Inventory Organizations are Part of an Operating Unit

Each organization classified as an inventory organization references an operating unit.
Inventory Organization Determines Items Available to Order Management
The Item Validation Organization parameter specifies which Oracle Manufacturing organization is used to validate inventory items. You must define all transactable items in this organization. Some inventory item attributes for Receivables and Order Management, including Tax Code and Sales Account, are specific to an operating unit or an accounting flexfield structure. Therefore, you should define an item validation organization for each operating unit.
Inventory Organization Determines Items Available to Purchasing
The inventory organization you specify in the financial options for each operating unit determines the items available in Purchasing. You can only choose an inventory organization that uses the same set of books as your operating unit.

You can define organizations and the relationships among them.
You create sets of books using the Define Set of Books window in Oracle General Ledger. You define all other types of organizations using the Define Organization window.
1. Business Group
The business group represents the highest level in the organization structure, such as the consolidated enterprise, a major division, or an operation company. The business group secures human resources information. For example, when you request a list of employees, you see all employees assigned to the business group of which your organization is a part.
Note: This is true in all applications except the HR applications, which support more granular security by a lower–level organization unit, the security profile. Multiple sets of books can share the same business group if they share the same business group attributes, including HR flexfield structures.
2. Set of Books
A financial reporting entity that uses a particular chart of accounts, functional currency, and accounting calendar. Oracle General Ledger secures transaction information (such as journal entries and balances) by set of books. When you use Oracle General Ledger, you choose a responsibility that specifies a set of books. You then see information for that set of books only.
3.1 Legal Entity
A legal company for which you prepare fiscal or tax reports. You assign tax identifiers and other legal entity information to this type of organization.
Note: There are currently only a few features provided for legal entities, such as intrastat movement reports and
intercompany invoice generation.
3.2 Balancing Entity
Represents an accounting entity for which you prepare financial statements. This is a segment in the Accounting Flexfield structure (usually the Company segment) at which all accounting entries must balance. There may be multiple companies within the same structure, and each of these must balance within itself. Each legal entity can have one or more balancing entities. You can use Flexfield Value Security rules to restrict data entry of balancing segment values by legal entity
or operating unit.
4. Operating Unit
An organization that uses Oracle Cash Management, Order Management and Shipping Execution, Oracle Payables, Oracle
Purchasing, and Oracle Receivables
. It may be a sales office, a division, or a department.
An operating unit is associated with a legal entity.
Information is secured by operating unit for these applications. Each user sees information only for their operating unit. To run any of these applications, you choose a responsibility associated with an organization classified as an operating unit.
5. Inventory Organization
An organization for which you track inventory transactions and balances, and/or an organization that manufactures or distributes products. Examples include (but are not limited to) manufacturing plants, warehouses, distribution centers, and sales offices. The following applications secure information by inventory organization:
Oracle Inventory, Bills of Material, Engineering, Work in Process, Master Scheduling/MRP, Capacity, and Purchasing receiving functions.
To run any of these applications, you must choose an organization that has been classified as an inventory organization.
6. HR Organization
HR organizations represent the basic work structure of any enterprise.
They usually represent the functional management, or reporting groups that exist within a business group. In addition to these internal  organizations, you can define other organizations for tax and government reporting purposes, or for third part payments.
7. Organizations in Oracle Projects
Oracle Projects allows you to define organization hierarchies to reflect your company’s organizations structure. You can add Oracle Projects–specific organization types to the organization hierarchy (for example, projects organizations or Expenditure organizations) to help you to better manage your project control requirements. You assign project and expenditure hierarchies to operating units.
8. Asset Organizations
An asset organization is an organization that allows you to perform asset–related activities for a specific Oracle Assets corporate depreciation book. Oracle Assets uses only organizations designated as asset organizations