Quantity Types (34/QT)
The system uses the quantity type user-defined code (UDC) 34/QT. Quantity types are predefined codes that define the display data on the time series screens and reports that use the MPS/MRP/DRP Summary File table (F3413). The quantity types are used by the MRP/MPS Requirements Planning program (R3482) and the Master Planning Schedule - Multiple Plant program (R3483) to calculate supply and demand.
Quantity types are alpha codes that represent various types of supply or demand on the time series. Any code that is preceded by a + symbol designates supply. Any code that is preceded by a – symbol designates demand or a reduction of supply. Some quantity types are designated as unadjusted. Unadjusted quantity types display the original quantity without planning actions. All other quantity types are displayed as though all planning actions have been processed.
UDC 34/QT codes are hard-coded; however, the descriptions explaining the codes are not hard-coded. If changes are made to the descriptions, you should document these changes by using the Row menu to access the Attachments form. Creating an attachment to the code with a changed description provides an audit trail of what was changed and why the change was implemented.