Work Center 
An area in a site at which inventory is manufactured or processed
Work centers are used to divide the portions of a routing along functional work lines.
You create a work center in Work Center Maintenance by assigning one of the following to it:
One or more resources
One or more work centers
Structure
Work centers can have the following attributes:
Status
Routing (see Routing)
Work Center Category
Work Center Type
Assignment Enforcement
For more information, see Work Center Maintenance.
Integration
Nesting Work Centers
Nesting work centers inside other work centers produces a hierarchical structure with resources as the bottom nodes as depicted on the graphic in the Example section.
Here are some tips for nesting work centers:
Assign only resources to work centers at the bottom-most level in the hierarchy
You can assign one or more work centers to another work center
You must create a work center before you can assign it to another work center
You can assign work centers to only one parent work center
You cannot assign a work center to itself
Sequencing Resources within a Work Center
You must supply a sequence value for each resource and work center you add to a work center in Work Center Maintenance. Assigning resources with sequence numbers to a work center eliminates the flexibility to choose any resource assigned to a resource type associated with the operation (see Production Operations Rules).
Sequence values assigned to resources are especially important when you create work centers for machine interfaces, such as VM. Sequence values allow you to control the order the system works SFC numbers at the machines on your line (see Releasing SFC Numbers to Work Centers and Order Rules).
System Rules
You can view and change the following system rules controlling work center processing in System Rules Maintenance:
Default Work Center for Release
Force Release to Work Center
Allow SFC Pull From Other Work Centers
For more information, see Order Rules and Production Operations Rules.
SAP ME ERP Integration
If you use the SAPMEINT component, see Transfer of Work Center to Resource/Work Center.
Example
The figure above shows a commonly used approach with several nested work centers and their various categories. The smallest boxes in the illustration represent resources. Some resources are also work centers. For example, WC7 is a work center that contains a single resource. Therefore, WC7 has category Cell.
WC3 and WC4 are Line category work centers. Each of these work centers categorizes an entire routing. These routings have identical routing steps (operations), but different resources. For example, if the first step on routing 1 is ASSY, the first step on routing 2 is also ASSY. However, the operator on routing 1 enters BENCH1 as the resource in the production operator dashboard, while the operator on routing 2 enters BENCH2. This approach allows you to track information about each resource separately.
The SFCs Can Be Released to This Work Center checkbox in Work Center Maintenance controls where users can release SFC numbers. In the example, this checkbox is selected only for WC3 and WC4. All other work centers are used for reporting purposes.