Business Process for Stock Master

Stock master is responsible for all updates to stock and directly updates the stock audit.
It is called from many places in the system. 
It also can update Sage 50 stock as required
The information that can be passed is as follows: 
@ProductID = ProductID of Material to be increased or reduced,
      @Qty = Quantity can be positive or negative
      @LocationID = The location of the product
      @Source = Note to store in stock audit to indicate where the adjustment came from
      @StockAdjustment= Value is depending upon variable whether SageStock will update or not, --'Yes',
      @Reason = 'Further information',
      @BatchNumber = 
      @CurrentUserID = CurrentUserID