Quantities in a change notice
A change notice (CN) contains four quantities.
P Qty - Project quantity - this is the total extended quantity of the item at one BOM location. For example, if there are five bolts in assembly A and there are three assembly As in the project, the P quantity for the bolt shows 15. If that same bolt exists in other locations, then each location shows a separate P quantity based on the quantities of the parent items above it in each branch. This column is driven by the eBOM quantity and cannot be changed here. You cannot order more than this quantity through a change notice.
Note: Items that have been marked as Reference only in the BOM have a P quantity equal to zero.H Qty - Historical quantity - this is the quantity of the item that has been ordered on previous CNs. The H quantity is updated when a CN workflow that contains a step to create the mBOM (manufacturing BOM) successfully completes. This does not guarantee that items were sent to an ERP system or otherwise, but simply that the previous CN’s workflow completed successfully in Upchain. You cannot return more than this quantity through a change notice.
R Qty - Requisition quantity - this is the quantity of the item that you are ordering (positive value) or returning (negative value) on this requisition. By default, when you select the item, the value entered is P - H. You can type in a different quantity into this field, including negative and decimal values where relevant, but it can never be higher than P - H. This is to prevent over ordering.
Move Qty - this quantity is populated when you redistribute the H quantity from an item’s previous revision to its current one or from an item's previous location to its current one. For example, if you have previously ordered the selected item at a revision level AA-00 but now your project contains the same item now at revision level AB-00 in the same BOM location, the Move quantity is used to update the H quantity that was recorded against AA-00 to AB-00. It is populated only by using the Redistribute Items button. See Orphans and Redistributing Items.
When an item is selected to be included in a CN, its default R Qty is calculated as follows:
R Qty = P Qty - H Qty
In other words:
R Qty = The total needed for the project - the total already ordered
After a CN successfully completes, the R Qty from previous CNs is added up to become the H Qty in subsequent CNs.