Plan units in Enterprise Planning
 Plan units are used to
		manage interdependencies that exist in constraint-based production planning. A
		plan unit groups plan items that must be planned together because of capacity
		or material constraints.
Plan units are only
		necessary for workload control.
How to define plan units
- Identify the main planning entities in a manufacturing
		  facility. A planning entity usually consists of items that share a particular
		  (bottleneck) resource, or items that share a particular (critical) material.
 - Define each planning entity as a plan unit in the Plan Unit (cprpd6100m000) session. Select the appropriate master-planning engine
		  for the plan unit.
 - Assign each item involved to a particular plan unit (in the Items - Planning (cprpd1100m000) session).