QAD 2017 Enterprise Edition > User Guides > Costing > Setting Up Product Costing > Defining Item Costs > Effect of Phantoms
  
Effect of Phantoms
Phantom items are used in manufacturing to define items that are made and consumed in the production process without being kept in inventory. For example, a wire harness that exists only briefly on the assembly line as a separate subassembly is defined as a phantom. Phantoms can be defined as local, global, or both. For more information on phantoms, see QAD Manufacturing User Guide.
Global phantoms identify an item as a phantom on all bills of material. You can perform routing cost rollups on global phantom items. Only lower-level labor, burden, and subcontract costs of a global phantom item are included in the parent item’s cost when the product structure cost rollup is performed.
In some cases, a global phantom can also require the issue of work orders to build the item as a stockable item, such as a service part. If you need to build and stock a phantom item, the routing and product structure cost rollups calculate this-level costs correctly.
Local phantoms are treated like phantoms only in specific product structures. The use of local phantoms is discouraged because this-level labor and overhead costs for local phantoms roll up into the parent item’s cost, causing manufacturing variances.