The QTY button next to the attribute field allows you to specify how many times the entered value was inspected.
If you leave the QTY unchanged, it defaults to 1.
Example:
If you are evaluating an apple’s Brix (sugar content) and enter 12.5, setting QTY to 3 indicates that this measurement was taken three times. If you do not adjust the QTY, it is assumed that the value was inspected once.