# Where Used Inquiry (WU.Q)
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The WU.Q procedure is an inquiry used to determine on which assemblies a given part number is referenced. The user may specify a part number or he may enter any of the parts file cross-reference items which include model number, category, and manufacturer part number. If these are entered the system will automatically substitute the corresponding part number, or display a list of possible part numbers which can be chosen. Once a part has been entered the system will display all of the assembly part numbers on which it is referenced.
Frequency of Use
Building the Where Used file ( WU.P1 ).